Improvement performance of getMavenVersion in ForkedLauncher

In method getMavenVersion in ForkedLauncher new Maven process is forked every time.

We can cache output by Maven home or try to read from properties files in Maven home /lib/maven-core-xxx.jar!/META-INF/maven/org.apache.maven/maven-core/pom.properties

There is also possibility to use Maven wrapper for executing - in this case we can read version form maven-wrapper.properties