Don't delete characters in password

[aidenkeating]

Currently we are using tr to remove the JENKINS_PASSWORD= section from our oc & grep result. However tr's functionality is as follows.

echo "aabbccdd" | tr -d b # Returns aaccdd

So we may delete characters in a password if they contain any of the characters included in JENKINS_PASSWORD=.

This uses awk instead.

[aidenkeating]

@laurafitzgerald @PhilipGough Would you mind taking a look?

[philipgough]

Looks good

[aidenkeating]

@PhilipGough Would you mind approving? It's a merge prerequisite