[FFE] Latest juju snapshot enables maas provider

The MaaS provider has been added and tests as working in upstream juju. Without this provider, users of the distro version of juju will not be able to use juju with MaaS.

Also, there have been a number of important bug fixes, one very important one is to allow nodes to be rebooted without losing connection to juju.

Here is the full upstream changelog:
504: <email address hidden> 2012-03-28 [trivial] change store url to correct location
503: <email address hidden> 2012-03-27 [merge] merge scheduler-peek-list
502: Jim Baker 2012-03-27 Reversed inadvertent commit in r501
501: Jim Baker 2012-03-27 [merge] Implements relation ident support.
500: <email address hidden> 2012-03-27 [merge] merge force-upgrade [r=bcsaller]
499: William Reade 2012-03-27 [merge] merge get-machines-bug [r=fwereade][f=965101][a=allenap]
498: William Reade 2012-03-27 [merge] merge maas-endpoint-url-with-resource-uris [r=fwereade][f=965138][a=allenap]
497: Clint Byrum 2012-03-26 [merge] [r=hazmat][f=965507] Using updated cloud-images query url with HTTPS
496: <email address hidden> 2012-03-26 [merge] merge status-changes simplify status output and support services with multiple relations under the same nam...
495: <email address hidden> 2012-03-26 [merge] merge repository-broken-charms repository.find should never break on charm error [r=fwereade]
494: <email address hidden> 2012-03-22 [trivial] remove setuptools dependencies, switch charm store back to domain, sans default-series use precise
493: <email address hidden> 2012-03-22 [trivial] full test suite update for cs url, update all references to use a constant in repository mod
492: <email address hidden> 2012-03-22 [trivial] update store unit test to point to temporary elastic ip
491: <email address hidden> 2012-03-22 remove ability to spec charm store url via env variable per request.
490: <email address hidden> 2012-03-22 [trivial] point juju to the charm store url [r=jimbaker,fwereade]
489: William Reade 2012-03-22 [merge] bzr merge maas-to-maas [a=allenap][r=hazmat]
488: William Reade 2012-03-22 [merge] merge use-maas-uris [a=allenap][r=fwereade][f=959334]
487: William Reade 2012-03-22 [merge] merge maas-get-nodes-fix [a=julian-edwards][r=fwereade][f=956697]
486: <email address hidden> 2012-03-20 [merge] merge setuppy-fixes from paul [a=][r=hazmat,clint]
485: <email address hidden> 2012-03-18 [trivial] hook exit and test teardown one liner fixes [r=bcsaller]
484: Kapil Thangavelu 2012-03-17 [merge] Various fixes around hook execution and scheduling.
483: Jim Baker 2012-03-16 [merge] merge robust-test-removed-service-unit [r=hazmat][f=829829]
482: Jim Baker 2012-03-16 [merge] merge refactor-machine-agent [r=bcsaller,hazmat][f=925211]
481: William Reade 2012-03-15 [merge] merge fix-maas-config-serialization [f=955677][r=fwereade]
480: William Reade 2012-03-15 [merge] merge apply-machine-constraints [f=907019][r=jimbaker,hazmat]
479: Clint Byrum 2012-03-14 [trivial] Fix type-o in online help for remove-relation (thanks Steve Yen)
478: Clint Byrum 2012-03-09 [merge] merge repo-from-env [r=hazmat][f=939932]
477: William Reade 2012-03-09 [merge] merge set-service-constraints [r=hazmat,bcsaller][f=907016]
476: <email address hidden> 2012-03-07 [merge] merge env-from-env. the juju environment that the cli acts upon can now b...
475: <email address hidden> 2012-03-07 [merge] merge deploy-upgrade. juju deploy now takes an --upgrade flag that will a...
474: Clint Byrum 2012-03-07 [trivial] Fixing maas tests to run without ~/.ssh/id_rsa.*
473: <email address hidden> 2012-03-07 [merge] merge bool-and-validate-defaults. New boolean service config option, serv...
472: <email address hidden> 2012-03-07 [merge] merge upgrade-sym-link, remove previous symlink targets before extracting...
471: <email address hidden> 2012-03-07 [merge] merge add-maas-provider. New juju machine provider for MaaS [a=allenap,ju...
470: William Reade 2012-03-06 [merge] merge constraint-types [r=jimbaker,hazmat][f=904201]
469: Benjamin Saller 2012-03-02 [merge] Merge implicit relations [f=940498] [r=jimbaker]
468: Benjamin Saller 2012-03-02 [merge] Merge Charm metadata support for subordinates [r=kapil] [f=940492]
467: William Reade 2012-02-22 [merge] merge lp:fwereade/juju/placement-spec [r=hazmat,bcsaller][f=900186]
466: William Reade 2012-02-22 [merge] merge restore-unit-relation-nodes [r=hazmat,jimbaker][f=925567]
465: <email address hidden> 2012-02-21 [merge] merge symlink-guard verify that charm symlinks don't extend outside of th...
464: Clint Byrum 2012-02-21 Use cloud-init declarative package install method rather than apt-get -y install, which leads to fai...
463: William Reade 2012-02-21 [merge] merge watch-related-units-callbacks [r=hazmat,jimbaker][f=900104]
462: William Reade 2012-02-21 [merge] merge resolve-unit-relation-diffs [r=jimbaker,hazmat][f=773600]
461: William Reade 2012-02-21 [merge] merge agent-trash-old-sessions [r=bcsaller,hazmat][f=898082]
460: William Reade 2012-02-21 [merge] merge upstartify-agents [r=hazmat,jimbaker][f=770482]
459: William Reade 2012-02-21 [merge] merge add-upstart-class [r=jimbaker,hazmat][f=903213]
458: William Reade 2012-02-21 [merge] merge fix-charm-upgrade [r=hazmat,jimbaker][f=903018]