Milestone #6351: Release JobSub v0.3.1
Client commands should generate x509 credentials from kerberos ticket every time if possible
We cannot always guarantee that users have clean environment or have right set of credentials. If accidentally we land up with voms credentials in the path/environment authentication does not work as voms servers public key may not be in the CA PATH to construct full x509 chain.
Approach for now is to use getcert to generate kca x509 and use them instead explicitly with the jobsub commands
Cons: commands will be slow now.