Small cleanup of db model.

* some params removed from constructors
* simplification of some property names

Change-Id: Iff8c08a7a0a1a28e1b10ea7264183eca7fae3215
Add simple plugin calls and cluster status updates

* provisioning plugin is now called while cluster creation
* cluster status is now updated while cluster creation

Change-Id: I7103589ab3ebe1079079d1773384633a89b1aba0
Enable all code style tests.

Fixes: bug #1187664

Change-Id: I214c94c4fd8277132c115e84d63d01d3753def4d