[MRELEASE-994] Drop Maven2 support
Upgrade mavenVersion dependencies to 3.0 (cleanup maven dependencies)
GenerateReleasePomsPhase, replace deprecated PathTranslator with SuperPomProvider and ModelInterpolator
JDomReporting, delete removed overridden methods
PlexusJUnit4TestCase, use code from org.sonatype.sisu:sisu-inject-plexus
AbstractReleaseTestCase, replace deprecated MavenProjectBuilder with ProjectBuilder
AbstractRewritingReleasePhaseTestCase, ignore internal extension based tests, not supported anymore
DefaultVersionInfoTest, adjust tests due to new comparison results
Add dummy org.codehaus.plexus:plexus-utils:1.1, required due to auto injection by org.apache.maven.plugin.internal.PlexusUtilsInjector
22 files changed
