Config unification

Replace Candlepin's Config class with Configuration from common. No more ```new Config()``` in mainline code, rely on injection of Configuration from Guice.

TEST
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Simply do what you normally do to use Candlepin.

NOTE: I did not update Gutterball.
When there are this many static imports, I favor just using a wildcard.  You can configure Eclipse to do this automatically by going to Preferences -> Java -> Code -> Organize Imports and setting *Number of static imports needed for a .\**  I have mine set to 2.