Building framework-3.0.x

[Mick Semb Wever]

To build Tiles Framework on the 3.0.x branch it looks like we need to add the  
`-Dhttps.protocols=TLSv1.2` jvm option
to get around the `Received fatal alert: protocol_version` error when 
downloading older dependencies.

For example:
MAVEN_OPTS="-Dhttps.protocols=TLSv1.2" mvn clean install