Log collector module

New:
  - [Done] multiple namespace selector
  - [Done] keyword-based pod selector
  - [Done] per-pod logs syntax detection and parsing
  - [Differed] in-place filtering for shorter logs
  - [Done] individual logs timestamp detection
  - [Done] Unix time bases Timestamp sorting
  - [Done] Single file logs output using common format
  - [Done] add all log types from all MOS namespaces and pods

Update:
  - resource preparation can be skipped per module
  - updated log collection using multiple threads
  - new setting LOG_COLLECT_THREADS

Fixes:
  - Network MTU fix
  - Faster cmd execution on single pod
  - Ceph benchmark validations
  - Ceph benchmark report sorting
  - Daemonset deployment with nodes skipped
  - Network tree debugging script
  - Tree depth limiter, i.e. stackoverflow prevention

  Related-PROD: PROD-36845

Change-Id: Icf229ac62078c6418ab4dbdff12b0d27ed42af1d
diff --git a/etc/example._env b/etc/example._env
index 80e4a72..d226d3b 100644
--- a/etc/example._env
+++ b/etc/example._env
@@ -40,9 +40,15 @@
 # Subfolder with scripts to be uploaded
 SALT_SCRIPTS_FOLDER=test_scripts
 
-# All nodes list file overide
+# All nodes list file overide when salt.keys request failed
 SALT_NODE_LIST_FILE=etc/example._list
 
 ### K8s section
-# All vars start with KUBE
-KUBE_CONFIG_ROOT=/root
\ No newline at end of file
+# Kube config root when it is being looked up on remote host
+KUBE_CONFIG_ROOT=/root
+# Script folder to store scripts in pod
+KUBE_SCRIPTS_FOLDER=cfg-checker-scripts
+# Kube host's username to use when accessing it via SSH
+KUBE_NODE_USER=mcc-user
+# Key to use when accessing kube hosts remotely
+KUBE_NODE_KEYPATH=/.../<project_folder>/envs/node.key
\ No newline at end of file