Added a switch in the script to also test pull requests via Travis-CI.
Added a switch in the script to also test pull requests via Travis-CI.

HaStr/kieker,kieker-monitoring/kieker,leadwire-apm/leadwire-javaagent,kieker-monitoring/kieker,HaStr/kieker,HaStr/kieker,HaStr/kieker,HaStr/kieker,kieker-monitoring/kieker,kieker-monitoring/kieker,leadwire-apm/leadwire-javaagent,kieker-monitoring/kieker