Parse mysql url without db name or query string (#54)

[slowteetoe]

This handles a mysql jdbc url that does not explicitly name a DB, and does not have a query string.

e.g. jdbc:mysql://somehost

[coveralls]

Pull Request Test Coverage Report for Build 197

• 7 of 7 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.2%) to 47.577%

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Totals
Change from base Build 196:	0.2%
Covered Lines:	432
Relevant Lines:	908

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💛 - Coveralls