Add unit tests for network_{create,delete}

These tests currently ALL fail, because the functions in api.py are wrong.
Replace Vlan with Network in model.py

Also do trivial fixes to api.py to make this work.

Currently, Network takes a parameter 'nic_id'.  I don't know what this does,
and the API doesn't have a place to specify it.  So, I've set it as 'FIXME'.
This should be fixed.

All tests now pass.
Add REST wrapper for network_{create,delete}
Add CLI wrappers for network_{create,delete}
Remove 'nic_label' column from Network table
Merge branch 'devel' into api-network-put-delete

Conflicts:
	tests/unit/api.py
Fix CLI help messages for network_{create,delete}
Merge branch 'devel' of git://github.com/CCI-MOC/haas into api-network-put-delete

Conflicts:
	haas/cli.py
	haas/server.py
Fix multiple bugs in network_{put,delete}
Merge pull request #132 from gsilvis/api-network-put-delete

Api network put delete