Renamed by internal convention

src/cpl/environment/__init__.py

@@ -21,7 +21,7 @@ from collections import namedtuple
 
 # imports:
 from .environment_abc import EnvironmentABC
-from .environment_name import EnvironmentName
+from .environment_name_enum import EnvironmentName
 from .hosting_environment import HostingEnvironment
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')

src/cpl/environment/hosting_environment.py

@@ -2,7 +2,7 @@ from socket import gethostname
 from typing import Optional
 
 from cpl.environment.environment_abc import EnvironmentABC
-from cpl.environment.environment_name import EnvironmentName
+from cpl.environment.environment_name_enum import EnvironmentName
 
 
 class HostingEnvironment(EnvironmentABC):