test/Objects: check for new constant imports

test/php/library/Director/Objects/rendered/service1.out

@@ -11,6 +11,6 @@ apply Service "___TEST___service" {
     assign where match("127.*", host.address)
     assign where host.vars.env == "test"
 
-    import "host var overrides (Director)"
+    import DirectorOverrideTemplate
 }
 

test/php/library/Director/Objects/rendered/service2.out

@@ -11,6 +11,6 @@ apply Service "___TEST___service" {
     assign where match("128.*", host.address)
     ignore where host.name == "localhost"
 
-    import "host var overrides (Director)"
+    import DirectorOverrideTemplate
 }