gbuild: JUnitTest: do not remove user-dir after test runs

The user-dir is already removed before the test runs, which is more
important; it may be convenient to look at documents written by the
tests, and these end up in the user-dir.

Change-Id: I53cc1ca49c6dfc5fa3e69f55413cf3eb8676befa

solenv/gbuild/JunitTest.mk

@@ -62,8 +62,7 @@ $(call gb_JunitTest_get_target,%) :
 		&& echo "    make debugrun" \
 		&& echo "    make gb_JunitTest_DEBUGRUN=T JunitTest_$*" \
 		&& echo \
-		&& false)) && \
-        rm -rf $(call gb_JunitTest_get_userdir,$*))
+		&& false)))
 	$(CLEAN_CMD)
 
 define gb_JunitTest_JunitTest