change jobsubClientCredentials.py to delete empty tmp files
On SLF5 machines, cigetcert -o existing_empty_file throws an exception, see #12928.
An easy workaround is in jobsubClientCredentials.py, line 186
tmp_file = NamedTemporaryFile(prefix="%s_"% fname, delete=False)
change this to
tmp_file = NamedTemporaryFile(prefix="%s_"% fname, delete=True)