[MSHARED-198] custom delimiters doesn't work as expected
Fixed for InterpolatorFilterReaderLineEnding as well
MSHARED-198 + MSHARED-199 with real unit-test
Introduced mockito

git-svn-id: https://svn.apache.org/repos/asf/maven/shared/trunk@1567794 13f79535-47bb-0310-9956-ffa450edef68