New signature for MongoConfigUtil.setOutputURI() that takes MongoClientURI

```setInputURI()``` has a signature that takes a ```MongoClientURI```, but ```setOutputURI()``` only has a signature that takes the deprecated ```MongoURI```.  This PR fixes that.

NOTE the ```setInputURI()``` signature that takes ```MongoURI``` is marked as deprecated.  Should I also deprecate the corresponding ```setOutputURI()``` signature?

Test results
---------

Tests fail for me on master, so the fact that they fail on this branch doesn't mean anything.  This change seems unlikely to break anything.


[jks@jks-desktop master /mnt/space/home/jks/work/mongo/mongo-hadoop]{f20}$ ./gradlew check
Building against hadoop 2.4 using 2.4.0 libraries
Checking if /home/jks/hadoop-binaries/hadoop-2.4.0/bin exists
:compileJava UP-TO-DATE
:processResources UP-TO-DATE
:classes UP-TO-DATE
:compileTestJava UP-TO-DATE
:processTestResources UP-TO-DATE
:testClasses UP-TO-DATE
:test UP-TO-DATE
:check UP-TO-DATE
:core:compileJava
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
:core:processResources UP-TO-DATE
:core:classes
:core:checkstyleMain
:core:compileTestJava
:core:processTestResources UP-TO-DATE
:core:testClasses
:core:checkstyleTest UP-TO-DATE
:core:findbugsMain FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':core:findbugsMain'.
> FindBugs encountered an error. Run with --debug to get more information.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 26.831 secs