Nick Forrington 6bda37f542 Fix clearing EnvironmentModifications with python2 (#10791) ... * Fix clearing EnvironmentModifications with python2 * Add EnvironmentModifications::clear unit test Use re-assignment rather than del to clear array * Fix flake issues		2019-03-12 20:12:51 -05:00
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spack	Fix clearing EnvironmentModifications with python2 (#10791)	2019-03-12 20:12:51 -05:00