Try to introduce JDT/UI BETA_JAVA8 via our (core) patch feature.
diff --git a/features/org.eclipse.objectteams.otdt.core.patch/feature.xml b/features/org.eclipse.objectteams.otdt.core.patch/feature.xml
index fd102d7..0ad9c14 100644
--- a/features/org.eclipse.objectteams.otdt.core.patch/feature.xml
+++ b/features/org.eclipse.objectteams.otdt.core.patch/feature.xml
@@ -69,4 +69,11 @@
          version="3.9.1.v_OTDT_r230_qualifier"
          unpack="false"/>
 
+   <plugin
+         id="org.eclipse.jdt.ui"
+         download-size="0"
+         install-size="0"
+         version="3.9.1.qualifier"
+         unpack="false"/>
+
 </feature>
diff --git a/features/org.eclipse.objectteams.otdt.feature/feature.xml b/features/org.eclipse.objectteams.otdt.feature/feature.xml
index fba2fc6..ef893f4 100644
--- a/features/org.eclipse.objectteams.otdt.feature/feature.xml
+++ b/features/org.eclipse.objectteams.otdt.feature/feature.xml
@@ -67,13 +67,6 @@
          version="2.3.0.qualifier"/>
 
    <plugin
-         id="org.eclipse.jdt.ui"
-         download-size="0"
-         install-size="0"
-         version="3.9.1.qualifier"
-         unpack="false"/>
-
-   <plugin
          id="org.eclipse.objectteams.otdt"
          download-size="73"
          install-size="110"