fix. bug in revert_rate.  Historics revs should be ordered by descending rev_id.

Change-Id: I16c30cf7b3e3edee3822aca33cdbcf12ae5b3f04
Make sure that a lock is always released.

Change-Id: Ifbd7972a738381d23d23a62cd645a7c25b8f32df
merge. changes in revert_rate.py

Change-Id: I23ee9d7d9aab89465d73bb711a4fc81dbc48d8c5

merge. changes in revert_rate.py

Change-Id: Ic3bc24ae24ef5609d16f79c15dfbb6d896ab7f6f

add. test for RevertRate.

Change-Id: Ia93567569c604564c30a3e76371c03570b2305b7

 tag. UMAPI version 0.1.5.

Change-Id: Id41fc14a95882ab2d416c85bb86b3c07dc8a145c
mod. except clause too broad - pass on empty queue only.

Change-Id: Ibcd1ee38fbae1b9a23dbd28445f2ae21f83fb95d
Merge "merge. changes in revert_rate.py"
merge. branch gerrit.

Change-Id: If71c744aeeea3407e32349514472332e4ac47ca2