As Openstack projects continue to have longer database migration
chains, the Puppet default timeout of 300 seconds for an execution
is becoming too short a duration on some hardware, leading to timeouts.
As projects continue to add more migration scripts without pruning
the base, timeouts will continue to become more frequent unless
this time can be expanded.
Change-Id: I19e62ec5f811b262b464815a5d7b6b7e2ed2eac1
Closes-Bug: #1904962
0cb3a8b007