replace ZENOSS_URL with localhost in the recording

This allows the tests to be run without setting env. variables.

Author: skrobul

test/test_helper.rb

@@ -16,4 +16,7 @@
 VCR.configure do |config|
   config.cassette_library_dir = "test/fixtures/vcr_cassettes"
   config.hook_into :webmock
+  config.before_record do |rec|
+    rec.request.uri.sub!(ZENOSS_URL, 'http://localhost:8080/zport/dmd')
+  end
 end