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/etc/example._env b/etc/example._env
index 1a8c472..80e4a72 100644
--- a/etc/example._env
+++ b/etc/example._env
@@ -6,18 +6,22 @@
 # Or run it from within a cloud
 
 # Main log file of the tests
-LOGFILE = 'cfg_checker.log'
+MCP_LOGFILE = 'cfg_checker.log'
 
 # SSH is used when environment is not local to get salt password
 # in order set options and user for the ssh, 
 # please, use ~/.ssh/config
 # SSH hostname of salt master node
-SSH_KEY=<ssh_keyfile_path>
-SSH_USER=<ssh_user>
-SSH_HOST=<ssh_hostname>
+MCP_SSH_KEY=<ssh_keyfile_path>
+MCP_SSH_USER=<ssh_user>
+MCP_SSH_HOST=<ssh_hostname>
+
+
+### Salt type section
+# All vars should start with SALT
 
 # Salt master host to connect to
-SALT_URL=127.0.0.1
+MCP_ENV_HOST=127.0.0.1
 
 # Salt master port.
 # Note that you can safely execute second master (not on production)
@@ -38,3 +42,7 @@
 
 # All nodes list file overide
 SALT_NODE_LIST_FILE=etc/example._list
+
+### K8s section
+# All vars start with KUBE
+KUBE_CONFIG_ROOT=/root
\ No newline at end of file