Tests for Dynamically build Ubuntu-based bootstrap

Test Cases

Bootstrap new node with custom bootstrap image, with additional package and files
1. Build custom bootstrap images with additional package and injected file
2. Upload custom bootstrap image to nailgun
3. Bootstrap new node
4. Check additional package and file

Build, upload, download and delete custom bootstrap image
1. Build custom bootstrap image
2. Upload it to nailgun
3. Download custom bootstrap image from nailgun and verify that it is the same
4. Delete custon image from nailgun

Deploy environment with custom bootstrap image
1. Build custom bootstrap images with additional package and injected file
2. Upload custom bootstrap image to nailgun
3. Bootstrap two new nodes
4. Assign one controller and one compute roles
5. Deploy environment
6. Run OSTF

Deploy environment with custom and default bootstrap images
1. Build custom bootstrap images with additional package and injected file
2. Upload custom bootstrap image to nailgun
3. Bootstrap two new nodes
4. Assign one controller and one compute roles
5. Deploy environment
6. Run OSTF
7. Upload default bootstrap
8. Bootstrap new compute node, verify bootstrap image
9. Deploy environment
10. Run OSTF

Deploy environment with custom bootstrap image for one node, reset env, verify bootsrap
1. Deploy environment with one controller and one compute
2. Run OSTF
3. Build and upload custom bootstrap image
4. Bootstrap new compute node, verify bootstrap image
5. Deploy environment
6. Run OSTF
7. Reset environment
8. Verify bootstrap is custom on all nodes

Deploy environment with custom bootstrap image for one node, delete node, verify bootstrap
1. Deploy environment with one controller and one compute
2. Run OSTF
3. Build and upload custom bootstrap image
4. Bootstrap new compute node, verify bootstrap image
5. Deploy environment
6. Run OSTF
7. Delete last compute
8. Verify bootstrap is custom on deleted node

+ set of tests for deprecated CentOS bootstrap