Remove the "rpc", "rcbops", and "rackspace" prefixes

Overview
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Being that the ansible project is now a community project we should change the **"rpc_"**, **"rackspace_"**, ect... variables and files to something more community driven.

Problem Description
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**rpc_** is everywhere throuhgout the stack and should be refactored. I don't know what we should change these references to I was thinking "opc" but then again, Im open to suggestions.

Proposed Change
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There are over 300 references to rpc, rackspace, rcbops throuhout the stack, not including license files. We should change prefix to be more community friendly.

Playbook Impact
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Basically all playbooks would be effected by this change.

Alternatives
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Leave everything they way it is.

Security Impact
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None

Performance Impact
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None

End User Impact
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None

Deployer Impact
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Users that were upgrading from previous generations of the stack would need to rename files/folders on the deployment host but there should be no other impact other than a cosmetic one.

Developer Impact
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None