updated test_gpg tests
updated test_gpg tests

A passphrase is needed to export an encrypted gpg private key
A passphase is not need to export a public key
The tests have been updated to reflect that fact.
One test was removed as it was attempting to export a private key
without pillar (but it was in fact using pillar to do that)

saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt