make ticker_interval available to hyperopt functions

freqtrade/resolvers/hyperopt_resolver.py

@@ -32,6 +32,9 @@ class HyperOptResolver(IResolver):
         hyperopt_name = config.get('hyperopt') or DEFAULT_HYPEROPT
         self.hyperopt = self._load_hyperopt(hyperopt_name, extra_dir=config.get('hyperopt_path'))
 
+        # Assign ticker_interval to be used in hyperopt
+        self.hyperopt.__class__.ticker_interval = config.get('ticker_interval')
+
         if not hasattr(self.hyperopt, 'populate_buy_trend'):
             logger.warning("Custom Hyperopt does not provide populate_buy_trend. "
                            "Using populate_buy_trend from DefaultStrategy.")