Revert "Merge branch 'execute.beforeClass.before.dataprovider' (#22)"

This reverts commit 43198a87427cf8a179537adbcf7f63d6a4dbac9e, reversing
changes made to 99df79095babf128bab5b9bd07ac23b6bce45101.
prepared bug-fix release 1.9.1
new development version 1.9.2-SNAPSHOT
added developer information as sonatype nexus requires it
added @AfterClass for placeholder acceptance tests
add param for junit version to build.gradle and adjusted .travis.xml
(#37)
junit version 4.8.2 is still default (#37)
remove failing test in junit version >= 4.9 (#37)
skip findBugs tasks for non-default junit versions to safe some build
time on ci (#37)
Merge branch 'master' into execute.beforeClass.before.dataprovider
implemented #22 such that it works for all JUnit versions
reverted unwanted changes compared to master (#22)