New audit state SUSPENDED is added in this patch set. If audit
state with continuous mode is changed from ONGOING to SUSPENDED,
audit's job is removed and the audit is not executed.
If audit state changed from SUSPENDED to ONGOING in reverse,
audit is executed again periodically.
Change-Id: I32257f56a40c0352a7c24f3fb80ad95ec28dc614
Implements: blueprint suspended-audit-state
Added some data model diagrams, sequence diagrams and state machine
diagrams.
The state machine diagrams and sequence diagrams are built with
PlantUML whereas data model diagrams are built with Dia.
Also added some textual description with the sequence diagrams.
Change-Id: Iffbb47b0f2d12ce63eeaa1531a1bd1a790d69e79
Closes-Bug: #1531802