implement optional concurrency limit for parallel blocks#57

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jcarrothers-sap wants to merge 7 commits intojenkinsci:masterfrom jcarrothers-sap:limitedParallel

+323-18

Commits on Jun 30, 2015

[FIXED JENKINS-28994] implement optional concurrency limit for parallel blocks
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improve testParallelLimitConcurrency to do a basic test of the limit
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Commits on Aug 28, 2015

fix potential ConcurrentModificationException failure on task abort
jcarrothers-sap
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Commits on Sep 22, 2015

Commits on Apr 4, 2016

improvements based on review comments
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