Enumeration of the various states a patch job passes through
as it executes.
Values:
STATE_UNSPECIFIED (0):
State must be specified.
STARTED (1):
The patch job was successfully initiated.
INSTANCE_LOOKUP (2):
The patch job is looking up instances to run
the patch on.
PATCHING (3):
Instances are being patched.
SUCCEEDED (4):
Patch job completed successfully.
COMPLETED_WITH_ERRORS (5):
Patch job completed but there were errors.
CANCELED (6):
The patch job was canceled.
TIMED_OUT (7):
The patch job timed out.