All contributors to this charm have agreed to the switch
from GPL v3 to Apache 2.0; switch to Apache-2.0 license
as agreed so we can move forward with official project status.
Change-Id: Ie7859853644fb819f1cd3062a2fea86766de0afb
Adds pause and resume unit to the charm such that the
charm stays paused during maintenance operations.
Partial-Bug: 1558642
Change-Id: Id5c44143f30305a3c412648cebb4c30caaa3e789