Enable RAP Tools in RCP package again

This reverts commit c68d0b1.

The dependency issues in RAP Tools are now fixed, and the contribution
to the Simultaneous Release Repository has been activated in M2 again
(still using Jetty 9.4 bundles, upgrade to 10.x planned).
Therefore re-adding the missing feature to the package.

Bug: https://bugs.eclipse.org/bugs/show_bug.cgi?id=572781
Signed-off-by: Markus Knauer <mknauer@eclipsesource.com>
Change-Id: I1eb22550b3b58707f1d2b1f842690ed8302b28f1

packages/org.eclipse.epp.package.rcp.product/epp.product

@@ -221,8 +221,7 @@ United States, other countries, or both.
       <feature id="org.eclipse.m2e.lemminx.feature" installMode="root"/>
       <feature id="org.eclipse.m2e.logback.feature" installMode="root"/>
       <feature id="org.eclipse.oomph.setup" installMode="root"/>
-      <!-- Disabled - see Bug 572781 -->
-      <!-- <feature id="org.eclipse.rap.tools.feature" installMode="root"/> -->
+      <feature id="org.eclipse.rap.tools.feature" installMode="root"/>
       <feature id="org.eclipse.swtbot.eclipse.gef" installMode="root"/>
       <feature id="org.eclipse.swtbot.eclipse" installMode="root"/>
       <feature id="org.eclipse.swtbot.ide" installMode="root"/>