If we run the tests as a reactor build we reference the dependencies
before they are shaded. This causes problems since we verify that unshaded versions
of a transitive dependency is not present. This commit moves the verification tests
into the integration test that always runs with the shaded version of the jar.
this commit adds a simple integration test that starts a
node from a shaded jar, indexes a doc and retrieves it. It
also has some basic unittests that try to load shaded classes and ensure
that their counterpart is not in the classpath.
Closes#12711