The current command used for alter a column (drop or alter) missing
the compatibility with sqllite. Solution, pass by using batch alembic.
Read http://alembic.readthedocs.org/en/latest/batch.html for more info.
Change-Id: I32c5cecaad111f2bde559de74ecefa339739b994
In this patch 'networking' field was removed from environment and
environment template models. Also, it was cleared from DB and tests.
Change-Id: I372f032a2b1fad1bd9c65016a8d3330bba4bf853
Closes-Bug: #1314192