setup_utils.py strips the equals sign off the end of my password

[kevinphippsstfc]

When installing the latest topcat snapshot (topcat-2.3.0-20170620.145947-5), the pinging of the JDBC connection is failing because (I think) setup_utils.py is stripping the equals sign off the end of my password. This also makes me question what it would do with other property values which have equals signs at other places in them (not just at the end). This can be quite common for JDBC URLs etc.