Add new package that exposes helper methods for generating default no…

[fieldju]

Add new package that exposes helper methods for generating default node metrics and http request/response middlewares.

[coveralls]

Pull Request Test Coverage Report for Build 155

• 119 of 119 (100.0%) changed or added relevant lines in 10 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+2.2%) to 89.88%

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Totals
Change from base Build 143:	2.2%
Covered Lines:	719
Relevant Lines:	785

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💛 - Coveralls

[fieldju]

@tlisonbee I'm moving this logic into this package are you cool with these names.