fix(backup): find race and disable search in subdir, always test latest backup image in e2e, bump backup to 0.3.x #341

Job	Run time
E2E Create tests list	3s
E2E Create tests list	3s
E2E Verify code before tests	2m 4s
E2E Verify code before tests	2m 4s
E2E new Jenkins pod should be created after a restart	6m 18s
E2E new Jenkins pod should be created after a restart	6m 18s
E2E authorization strategy is not overwritten after a restart	2m 1s
E2E authorization strategy is not overwritten after a restart	2m 1s
E2E performs backups before pod deletion and restores them even Jenkins status is restarted	12m 0s
E2E performs backups before pod deletion and restores them even Jenkins status is restarted	12m 0s
E2E creates vanilla Jenkins instance and configures it	4m 9s
E2E creates vanilla Jenkins instance and configures it	4m 31s
E2E creates Jenkins instance with priority class and configures it	4m 14s
E2E creates Jenkins instance with priority class and configures it	4m 14s
E2E runs kubernetes plugin job successfully	6m 8s
E2E runs kubernetes plugin job successfully	6m 8s
	1h 14m 16s

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