Remove comments prior to the fix (JAVA-402)
Removed System.out.println calls in test
Change default value for max requests per host.
Merge pull request #238 from pingtimeout/JAVA-467

Removed System.out.println calls in test
Merge pull request #237 from pingtimeout/JAVA-402

Remove comments prior to the fix (JAVA-402)
Add Clirr plugin + fix backward compatibility issues.
Update upgrade guide for 2.1.2.