Nested Classes -- Bug Fix

[ncilfone]

fixes issues wrt more than 2 levels of class nesting references. code was assuming to fall back on defaults instead of recursing the config space to set the correct parameters.

Handles (#139)

• extra unit tests
• linted

[coveralls]

Pull Request Test Coverage Report for Build 1396170516

• 15 of 16 (93.75%) changed or added relevant lines in 2 files are covered.
• 2 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.1%) to 93.235%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
spock/backend/builder.py	14	15	93.33%

Files with Coverage Reduction	New Missed Lines	%
spock/backend/builder.py	1	85.46%
spock/backend/typed.py	1	96.4%

Totals
Change from base Build 1387165605:	0.1%
Covered Lines:	1392
Relevant Lines:	1493

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💛 - Coveralls