Revert "Removed  StrictHostKeyChecking=no"

This reverts commit 944a9ef3c15cb418ad987c3ab186f9f60e813250.

Reason for revert: Can't make ssh to nodes, error
"""
(fuel-devops30) harhipova@foundation:~$ ssh root@10.7.0.15
root@10.7.0.15's password:

Permission denied, please try again.
"""

Related-Prod: #PROD-33975(PROD:33975)

Change-Id: I44864c1306e368e73afa1869ced38a83351d4620
diff --git "a/\173\173 cookiecutter._env_name \175\175/overrides.yml" "b/\173\173 cookiecutter._env_name \175\175/overrides.yml"
index fb41359..41274c4 100644
--- "a/\173\173 cookiecutter._env_name \175\175/overrides.yml"
+++ "b/\173\173 cookiecutter._env_name \175\175/overrides.yml"
@@ -41,6 +41,7 @@
               alive:
                 interval: 60
                 count: 5
+              stricthostkeychecking: no
               userknownhostsfile: '/dev/null'
   linux:
     system: