Adds reset-task-status mgmt api instance action

When reset-task-status is called the instance's task status is set to NONE.

Partially implements: blueprint reset-task-status-mgmt-api

Change-Id: I3150b53c3feb586d4bcfa8a2f5807ecd53c89e26
Prevent Upstart from restarting guest in Restart tests

Stop the mysql service explicitly during the blackbox restart
tests, so that upstart does not try to re-spawn the mysql process
and cause test failures. This is needed for the blackbox tests to
successfully run.

Fixes bug: 1110895

Change-Id: I44cfeac3350913af5b6cb05b8b3373ab84c448f7
Merge "Adds reset-task-status mgmt api instance action"
Merge "Prevent Upstart from restarting guest in Restart tests"
Ignore .testrepository directory.

Fixes bug #1120549

Change-Id: I0b1812699d143965dc18996d52fd4698d9ce14a5
Modify-user features.

Grant, revoke, list user access.
Change user password and get single user.