ACCUMULO-3126 Fix malformed package-info.java

  Place javadoc above package declaration.
ACCUMULO-3172 Remove -dirty flag on releases

  Changes mavanagaiata plugin to stop incorrectly marking hashes as '-dirty'
  when using maven-release-plugin to create releases.
ACCUMULO-3437 Stricter thrift version checking

  Make Accumulo 1.5.x explicitly check for Thrift 0.9.0, not just 0.9.