Daniel Nephin 146d3eb304 Fix environment resolving.
Load from env should only happen if the value is unset.
Extract a buildEnvironment function and revert some changes to tests.

Signed-off-by: Daniel Nephin <dnephin@docker.com>
2017-03-14 16:00:43 -04:00
2017-03-14 16:00:43 -04:00
2017-03-14 16:00:43 -04:00
2017-02-14 09:54:27 +08:00
2017-02-07 11:08:37 -08:00
2017-03-06 17:31:04 +05:30
2016-08-25 13:09:04 -04:00
2016-07-05 20:42:17 +08:00
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