Add import order setting for Eclipse "Organize Imports" utility

The gerrit project has a customized import order setting, which is
under version control in the Eclipse setting file:

    .settings/org.eclipse.jdt.ui.prefs

However some of the other Gerrit related projects (i.e. non-core
plugins) do not have this setting.  In some cases the whole .settings
folder is ignored by git.

Add a file that can be imported into the project to set the correct
import order.

Change-Id: I188d7915f27b9c7c0dc5e04c9e6b2f5dcabd0807

tools/gerrit.importorder

@@ -0,0 +1,9 @@
+#Organize Import Order
+#Wed Jan 14 10:19:45 JST 2015
+6=javax
+5=java
+4=org
+3=net
+2=junit
+1=com
+0=com.google