CB2.0: Use Postgres for everything. [1/2]

Use Postgres for dev and test along with production.

You will need postgres 9.3 with a somewhat custom config.
./dev tests run will whine and tell you what to do of your local postgres is not configured approppriately.

 bin/crowbar_converge                      |  4 ++--
 crowbar_framework/app/models/node_role.rb |  5 ++---
 crowbar_framework/config/database.yml     | 16 ++++++++++------
 3 files changed, 14 insertions(+), 11 deletions(-)

Crowbar-Pull-ID: a91d010e6f77c4fc84104247bc7752f73dab5b4d

Crowbar-Release: development