Add resize server action.

This looks like it should do the trick.  Intermittently, however, some
servers created by the acceptance test will end up in an error state.
It is not consistently reproducible.  When it does work, however, it
works as expected.  I'm not sure why the behavior is variable.
diff --git a/acceptance/libargs.go b/acceptance/libargs.go
index 405938a..67858f1 100644
--- a/acceptance/libargs.go
+++ b/acceptance/libargs.go
@@ -122,3 +122,9 @@
 
 	return newServer.Id, nil
 }
+
+// findAlternativeFlavor locates a flavor to resize a server to.  It is guaranteed to be different
+// than what aSuitableFlavor() returns.  If none could be found, this function will panic.
+func findAlternativeFlavor() string {
+	return "3"  // 1GB image, up from 512MB image
+}
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