Updates to import statements:

- Import importlib, os, and sys to each python script.
 - Append "lanforge-scripts" root directory to the system path, allowing each script to be called from an antecedent directory. e.g.
if 'lanforge-scripts' not in sys.path:
    sys.path.append(os.path.join(os.path.abspath(__file__ + "../../../../../")))
 - All statements of the form 'from <module> import <class>' replace with:
<module> = importlib.import_module("lanforge-scripts.<directory>.<module>")
<class> = <module>.<class>

py-scripts/test_l4.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python3
-
 """
 NAME: test_l4.py
 
@@ -51,25 +50,28 @@ Use './test_l4.py --help' to see command line usage and options
 Copyright 2021 Candela Technologies Inc
 License: Free to distribute and modify. LANforge systems must be licensed.
 """
-
 import sys
 import os
+import importlib
+import time
+import argparse
+import datetime
 
 if sys.version_info[0] != 3:
     print("This script requires Python 3")
     exit(1)
 
-if 'py-json' not in sys.path:
-    sys.path.append(os.path.join(os.path.abspath('..'), 'py-json'))
+if 'lanforge-scripts' not in sys.path:
+    sys.path.append(os.path.join(os.path.abspath(__file__ + "../../../../")))
 
-import argparse
-from LANforge.lfcli_base import LFCliBase
-from LANforge import LFUtils
-import realm
-import time
-import datetime
-from realm import TestGroupProfile
-from port_utils import PortUtils
+lfcli_base = importlib.import_module("lanforge-scripts.py-json.LANforge.lfcli_base")
+LFCliBase = lfcli_base.LFCliBase
+LFUtils = importlib.import_module("lanforge-scripts.py-json.LANforge.LFUtils")
+realm = importlib.import_module("lanforge-scripts.py-json.realm")
+Realm = realm.Realm
+TestGroupProfile = realm.TestGroupProfile
+port_utils = importlib.import_module("lanforge-scripts.py-json.port_utils")
+PortUtils = port_utils.PortUtils
 
 
 class IPV4L4(LFCliBase):