Multi env support and Kube client integration

Kube friendly Beta

Package versions supports Kube env

Added:
  - Env type detection
  - New option: --use-env, for selecting env
    when function supports multiple detected envs
  - Updated config loading
  - Each module and command type has supported env check
    and stops execution if it is on unsupported env
  - Functions can support multiple envs
  - Kubernetes dependency
  - Kubenernetes API detection: local and remote
  - Package checking class hierachy for using Salt or Kube
  - Remote pod execution routine
  - Flexible SSH/SSH Forwarder classes: with, ssh,do(), etc
  - Multithreaded SSH script execution
  - Number of workers parameter, default 5

Fixed:
  - Config dependency
  - Command loading with supported envs list
  - Unittests structure and execution flow updated
  - Unittests fixes
  - Fixed debug mode handling
  - Unified command type/support routine
  - Nested attrs getter/setter

Change-Id: I3ade693ac21536e2b5dcee4b24d511749dc72759
Related-PROD: PROD-35811
diff --git a/cfg_checker/common/log.py b/cfg_checker/common/log.py
index 6edac2f..4c1c02c 100644
--- a/cfg_checker/common/log.py
+++ b/cfg_checker/common/log.py
@@ -91,6 +91,6 @@
     'cfg_checker',
     log_fname=os.path.join(
         pkg_dir,
-        os.getenv('LOGFILE', 'cfg_checker.log')
+        os.getenv('MCP_LOGFILE', 'cfg_checker.log')
     )
 )