Add url to pom's scm configuration
Add url to pom's scm configuration

Central requires a url in scm. Since we want to upload to central, we
add it.

Change-Id: Iebf784d970a500c5c5964e592a378f83300de615

quelltextlich/jacoco-toolbox,quelltextlich/jacoco-toolbox,mackerl/jacoco-toolbox,mackerl/jacoco-toolbox