use utf-8 to load metainfo deps

required to use non ascii chars in meta info with python3.5

common/python/nomadcore/local_meta_info.py

@@ -195,7 +195,7 @@ class RelativeDependencySolver(object):
         depInfo = None
         depIKEnv = InfoKindEnv(path = dPath, dependencyLoader=infoKindEnv.dependencyLoader)
         self.deps[dPath] = depIKEnv
-        with open(dPath) as f:
+        with open(dPath, encoding="utf-8") as f:
             try:
                 depInfo = json.load(f)
             except:
@@ -646,7 +646,7 @@ class InfoKindEnv(object):
 def loadJsonFile(filePath, dependencyLoader = None, extraArgsHandling = InfoKindEl.ADD_EXTRA_ARGS, uri = None):
     env = InfoKindEnv(dependencyLoader = dependencyLoader, path = filePath, uri = uri)
     try:
-        with open(filePath) as f:
+        with open(filePath, encoding="utf-8") as f:
             o = json.load(f)
             warnings = env.fromJsonList(o, name = os.path.basename(filePath), source = {'path': filePath}, extraArgsHandling = extraArgsHandling)
     except: