LPS-34021 Readd antcontrib and use ivy only if ivy.xml is updated
LPS-34021 Add ivy.xml to plugins
LPS-34021 gitignores, cache, jars
LPS-34021 SF
LPS-34021 Fix build
LPS-34021 More reliable check
LPS-31876 Allow plugins developer to use Mockito, Powermock and Spring test classes
LPS-31876 jars