retake on #55 missed fixing a method

Merge pull request #56 from pnerg/default-executor-issue

fixed issue when creating custom executor from system property #55

prepare for release of 1.11

prepare to release 1.10

prepare for release of 1.9.1

prepare for release of 1.9

prepare for release of 1.8

prepare for release of v1.7

[maven-release-plugin] copy for tag v1.6

[maven-release-plugin] copy for tag v1.5