Remove project_apply

Networking operations on nodes now happen instantly.  The 'dirty' flag does
not exist.
Fix documentation and CLI for project_apply
Clean up testsuite a little

- Remove some redundant or useless tests
- Rename 'simple_vlan' tests for clarity
Remove references to 'apply' from comments and docs
Remove unneeded deployment test

This test is covered by the null-vlan unit test.
Merge pull request #272 from gsilvis/transition

Remove project_apply