ACCUMULO-3200 Remove unused class
ACCUMULO-3203 Remove unused class
Merge branch '1.6'
ACCUMULO-3031 Conditionally ignore known-bad test due to JDK bug

  Skip test execution when building on a known bad JDK version in the range
  (1.7.0_60, 1.7.0_72). This bug is expected to be fixed in 1.7.0_72.