DATAMONGO-895, DATAMONGO-896 - Assert functionality against latest mongodb java driver. 

Upgrade driver in profile to rc3.
Relaxing error message comparison in assertion so that it still matches against the message returned by MongoDB 2.6.

Original Pull Request: #160 (Jeff Yemin)

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When comparing the value of the version field, compare against a Long rather than an Integer, since the version field generated is a Long. This allows the test to pass against the upcoming 2.12.0 release of the Java driver, which has a stricter implementation of BasisDBObject.equals.

Original Pull Request: #159 (Jeff Yemin)