server: Fix Update Operation

[dave-tucker]

The update operation wasn't working :(
This commit fixes it such that:

• It checks the fields sent in the Update RPC
• For each field, it attempts to info.SetField in the matching row
• Calls cache.Update to commit changes

Fixes: #201

Signed-off-by: Dave Tucker dave@dtucker.co.uk

[dave-tucker]

@amorenoz there are tests in this PR commented out, which can be uncommented once #203 is fixed.

[coveralls]

Pull Request Test Coverage Report for Build 1070551716

• 37 of 67 (55.22%) changed or added relevant lines in 3 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage increased (+0.5%) to 76.272%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
cache/cache.go	0	1	0.0%
server/database.go	0	13	0.0%
server/transact.go	37	53	69.81%

Files with Coverage Reduction	New Missed Lines	%
server/transact.go	1	60.57%

Totals
Change from base Build 1067951928:	0.5%
Covered Lines:	3282
Relevant Lines:	4303

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💛 - Coveralls