Fix some tests, don't default to freqtrade/strategy for imports

freqtrade/resolvers/iresolver.py

@@ -28,7 +28,9 @@ class IResolver:
     def build_search_paths(cls, config: Dict[str, Any], user_subdir: Optional[str] = None,
                            extra_dir: Optional[str] = None) -> List[Path]:
 
-        abs_paths: List[Path] = [cls.initial_search_path]
+        abs_paths: List[Path] = []
+        if cls.initial_search_path:
+            abs_paths.append(cls.initial_search_path)
 
         if user_subdir:
             abs_paths.insert(0, config['user_data_dir'].joinpath(user_subdir))

freqtrade/resolvers/strategy_resolver.py

@@ -27,7 +27,7 @@ class StrategyResolver(IResolver):
     object_type = IStrategy
     object_type_str = "Strategy"
     user_subdir = USERPATH_STRATEGIES
-    initial_search_path = Path(__file__).parent.parent.joinpath('strategy').resolve()
+    initial_search_path = None
 
     @staticmethod
     def load_strategy(config: Dict[str, Any] = None) -> IStrategy: