Fix build scripts for BOM (#17025)

Change-Id: Ia59a2423d8e22e15a978dd73baf08b5fa6388ea6

all/build.xml

             </then>
             <else>
                 <!-- Unpack all source files to javadoc.temp.dir -->
-                <antcontrib:foreach list="${modules.to.publish.to.maven}"
+                <antcontrib:foreach list="${modules.producing.jar}"
                     target="unzip.to.javadoctemp" param="module" />
 
                 <property name="javadoc.dir" location="${result.dir}/javadoc" />
 
     <target name="copy-jars">
         <delete dir="${temp.dir}" />
-        <antcontrib:foreach list="${modules.to.publish.to.maven}"
+        <antcontrib:foreach list="${modules.producing.jar}"
             target="fetch.module.and.dependencies" param="module" />
         <!-- All jars are now in temp.dir. Still need to separate vaadin 
             and deps -->

all/ivy.xml

             rev="${vaadin.version}" />
         <dependency org="com.vaadin" name="vaadin-push" rev="${vaadin.version}" />
         <dependency org="com.vaadin" name="vaadin-widgets" rev="${vaadin.version}" />
-        <dependency org="com.vaadin" name="vaadin-bom" rev="${vaadin.version}" />
 
     </dependencies>
 

common.xml

     <property name="gwt.basedir" location="${vaadin.basedir}/../gwt" />
     <property file="${vaadin.basedir}/build.properties" />
 
-    <property name="modules.to.publish.to.maven" value="shared,server,client,client-compiler,client-compiled,themes,push,widgets,bom" />
+    <property name="modules.producing.jar" value="shared,server,client,client-compiler,client-compiled,themes,push,widgets" />
+    <property name="modules.to.publish.to.maven" value="${modules.producing.jar},bom" />
     <property name="modules.to.publish.to.download" value="${modules.to.publish.to.maven},all" />
 
     <ivy:settings file="${vaadin.basedir}/ivysettings.xml" />