Add OS::Neutron::RouterL3Agent for router.py

This resource supports part of "agent management and scheduler
extensions" in Neutron. It associates router with l3-agent.

see related-bug: #1245366

Closes-bug: #1259845
Change-Id: I781645e62beb4fe60e064d61ad298834e551142d
Convert OSDBInstance to new Schema format

blueprint property-schema-conversion

Change-Id: Ieec1c81e4a4675fa49d953c948ef9a9f111177a3
WaitCondition Count property is now updatable

The Count property of WaitCondition resource was modified to be
updatable.
Now, when that property is updated, the WaitCondition and the associated
WaitConditionHandle are no longer being regenerated.

Change-Id: If234b7a1400ff1b2c17fc24c436d8f64f4b1fd88
Closes-Bug: #1228362
Merge "Convert OSDBInstance to new Schema format"
Merge "WaitCondition Count property is now updatable"
Merge "Add OS::Neutron::RouterL3Agent for router.py"