Adding remove_file options to yaml so we can add files to be removed from packages

(cherry picked from commit b7803a3633)

conf/components/glance.yaml

@@ -34,4 +34,7 @@ keystone:
 # metadata about them, so that re-examination before
 # uploading does not have to occur
 image_cache_dir: "/usr/share/anvil/glance/images"
+
+# Used by install section in the specfile
+remove_file: /bin/rm -rf %{buildroot}/usr/bin/glance
 ...

conf/templates/packaging/spec.tmpl

@@ -121,6 +121,9 @@ $build.action
 #if $build.has_key('install_how')
 $build.install_how
 #end if
+#if $build.has_key('remove_file')
+$build.remove_file
+#end if
 
 %files
 %defattr(-,root,root,-)