Fail getting proxy if cigetcert fails for any reason

[retzkek]

The check only actually returns an exception for one specific error condition, continuing on for others, which still may not have gotten a certificate. This can result in confusing errors like PermissionError: Failed attempting 'voms-proxy-init ...

jobsub_lite/lib/fake_ifdh.py

Lines 360 to 365 in 115727d

	if cigetcert_cmd.returncode != 0:
	if "Kerberos initialization failed" in cigetcert_cmd.stdout:
	raise Exception(
	"Cigetcert failed to get proxy due to kerberos issue. Please ensure "
	"you have valid kerberos credentials."
	)