Improved tests and fixed a few bugs

This merge extends the test suite to include more of the options allows in the configuration file, and fixes bugs discovered therein.

gwdatafind_server/__init__.py

@@ -43,11 +43,11 @@ class DataFlask(Flask):
 
     def get_cache_data(self, *keys):
         while not self.manager.ready:
+            # cache file is not ready
             self.logger.debug("Waiting for cache...")
             time.sleep(.5)
         self.manager.lock.acquire()
         try:
-            print(self.manager.cache)
             return self._get_cache_data(keys)
         finally:
             self.manager.lock.release()
@@ -59,10 +59,7 @@ class DataFlask(Flask):
             return self.manager.cache.get(last, {})
         ent = self.manager.cache.get(keys.pop(0), {})
         for key in keys:
-            try:
-                ent = ent[key]
-            except KeyError:
-                return {}
+            ent = ent[key]
         return ent.get(last, {})
 
     def shutdown(self):