Revert "CeylondocToolTest: SDK no longer needs a java compilation"

This reverts commit cdf057fd38a01d56be2dc1ac696914feecd5d396.

Conflicts:
	test/ceylondoc/com/redhat/ceylon/ceylondoc/test/CeylonDocToolTest.java

Turns out we do need it after all
CeylondocToolTest: JavaHelper in SDK requires undertow