Changing repos to central in preparation for release
Review of all pom.xml files

All files were standardised, 1.6 minimum (except for trap-utils). All
repositories were either removed (changed implicitly to Maven Central)
or changed to oss.sonatype.com.
Merge pull request #2 from meledin/central

Change repositories to central for public release
Caching of dependencies in AWS to speed up builds
Removed HTTPS for ericsson.com as apparently the cert is outdated