Add migration 021 set_engine_mysql_innodb

Change: I1536c9276bc807aac26849e37556b465e8b5c9eb which added
migration 018 neglected to set the mysql engine to InnoDB
when it added the image_locations table. This commit adds a
new migration to set the image_locations table to the InnoDB
engine.

Change-Id: I935065d8e1929d5df075cc5c7de81793b1dd73a1
Fix broken JSON schemas in v2 tests

* The required attribute is not allowed in draft 4 of JSON schema
* The dependency on jsonschema can be relaxed back to all versions

Change-Id: Id0767cfe2fe46d73999563896f851ffb01aa9489
Redact location from notifications

Redact the value of 'location' in notifications since it may contain
credentials.

Fix for bug 1125130.

Change-Id: Ic0baee259ac46479f8992eca2b02c307fcaf70ac
Merge "Fix broken JSON schemas in v2 tests"
Merge "Redact location from notifications"
Removed controversial common image property 'os_libosinfo_shortid'

Change-Id: I3a0247b5547d5735aeb0bcbd3e9b4a74ea85208f
Merge "Add migration 021 set_engine_mysql_innodb"