Various fixes for findbugs.xml, messages.xml and ECB detection

1) Fixed the abbreviations that were different between the findbugs.xml and the messages.xml for three issues.

2) Predictable Random Number Generator Issue did not have a BugCode, fixed this.

3) Updated the ECB Issue - there are other ciphers than just AES to consider, as well as any other a 3rd party provider might add. Updated test code to handle these changes.

4) Changed findbugs.xml defaultenabled=true. I've had trouble integrating this plugin in other scenarios such as Jenkins Findbugs Plugin, where it doesn't get run due to this.