Verify that all locks are mentioned in listAllLocksOwners
Verify that all locks are mentioned in listAllLocksOwners

Add a test verifying that whenever an owner owns a lock, it
is also mentioned in the output of listAllLocksOwners.

Signed-off-by: Klaus Aehlig <4ce51de36d9068cd7db2eec1151e0f3f95419008@google.com>
Reviewed-by: Petr Pudlak <9d19625f8ee825a2c398462ed335cbcf98f79c32@google.com>

leshchevds/ganeti,andir/ganeti,dimara/ganeti,ganeti/ganeti,mbakke/ganeti,grnet/snf-ganeti,ganeti-github-testing/ganeti-test-1,bitemyapp/ganeti,leshchevds/ganeti,apyrgio/ganeti,yiannist/ganeti,bitemyapp/ganeti,apyrgio/ganeti,grnet/snf-ganeti,onponomarev/ganeti,mbakke/ganeti,yiannist/ganeti,andir/ganeti,dimara/ganeti,onponomarev/ganeti,yiannist/ganeti,ganeti/ganeti,ganeti/ganeti,andir/ganeti,ganeti-github-testing/ganeti-test-1,mbakke/ganeti,leshchevds/ganeti