TEIIDDES-879: Ensure the feature dependencies are correct

* The teiid runtime client plugins now depend on the connectivity plugins
  and as such that feature must be included in the client feature when
  installing.

* The main designer feature does not include the connectivity feature either
  so its a miracle that no errors have been reported when this has not
  been installed, since it depends on at least connecitivity.ui

* Likewise the connectivity feature must include the spi since it is relied
  upon by the plugins. Its never been a problem before since all 3 features
  are installed together so the spi has been present. However, installing
  the connectivity feature on its own will fail due to the lack of the spi
  plugin.

features/org.teiid.datatools.connectivity.feature/feature.xml

@@ -51,4 +51,11 @@
          version="0.0.0"
          unpack="false"/>
 
+   <plugin
+         id="org.teiid.designer.spi"
+         download-size="0"
+         install-size="0"
+         version="0.0.0"
+         unpack="false"/>
+
 </feature>

features/org.teiid.designer.feature/feature.xml

@@ -26,6 +26,10 @@
       %license
    </license>
 
+   <includes
+         id="org.teiid.datatools.connectivity.feature"
+         version="0.0.0"/>
+
    <requires>
       <import plugin="org.eclipse.ui.cheatsheets" version="3.4.200" match="compatible"/>
       <import plugin="org.eclipse.ui.ide" version="3.8.0" match="compatible"/>

features/org.teiid.designer.teiid.client.feature/feature.xml

@@ -17,20 +17,9 @@
       %license
    </license>
 
-   <requires>
-      <import plugin="org.jdom" version="1.1.1" match="compatible"/>
-      <import plugin="org.jboss.tools.locus.sf.saxon" version="9.2.1" match="compatible"/>
-      <import plugin="org.hamcrest.core" version="1.1.0" match="compatible"/>
-      <import plugin="org.teiid.designer.spi" version="8.1.0" match="compatible"/>
-      <import plugin="org.eclipse.core.runtime" version="3.8.0" match="compatible"/>
-      <import plugin="org.eclipse.core.resources" version="3.8.0" match="compatible"/>
-      <import plugin="org.eclipse.wst.server.core" version="1.4.0" match="compatible"/>
-      <import plugin="org.eclipse.datatools.connectivity" version="1.2.5" match="compatible"/>
-      <import plugin="org.jboss.ide.eclipse.as.core" version="2.4.0" match="compatible"/>
-      <import plugin="org.jboss.ide.eclipse.as.dmr" version="2.4.0" match="compatible"/>
-      <import plugin="org.jboss.ide.eclipse.as.management.core" version="2.4.0" match="compatible"/>
-      <import plugin="org.eclipse.osgi"/>
-   </requires>
+   <includes
+         id="org.teiid.datatools.connectivity.feature"
+         version="0.0.0"/>
 
    <plugin
          id="org.teiid.8.4.x"