Create authentication-with-java-driver.txt

Just starting it off.  Don't pull yet...
Update source/tutorial/authentication-with-java-driver.txt

Added description of existing authentication using the new MongoClient API
Update source/tutorial/authentication-with-java-driver.txt

Added Kerberos section
Update source/tutorial/authentication-with-java-driver.txt

Updated some property values.  Set codeblock lexer.
merge: java auth documentation
java authentication docs