yang-maven-plugin-spi depends on repackaged guava 0.9

maven-plugin-api has an unfortunate dependency on forked guava 0.9: org.sonatype.sisu:sisu-guava:0.9.9
Consider excluding this artifact since it conflicts with guava 14 that is also on classpath. Especially annoying is usage in OSGi and automatic resolving of import package versions by BND, since all guava packages will have constraint of version 0.9