Add retry for all requests to the Jenkins client on cluster

Change-Id: I69eccbebb58f3ce902abd11cf3926330e5fb2204
Related-Prod: #PROD-35718
diff --git a/tcp_tests/managers/reclass_manager.py b/tcp_tests/managers/reclass_manager.py
index f8895c6..137dd33 100644
--- a/tcp_tests/managers/reclass_manager.py
+++ b/tcp_tests/managers/reclass_manager.py
@@ -23,7 +23,7 @@
     __config = None
     __underlay = None
     reclass_tools_cmd = ". venv-reclass-tools/bin/activate; reclass-tools "
-    tgt = "cfg01"    # place where the reclass-tools installed
+    tgt = "cfg01"  # place where the reclass-tools installed
 
     def __init__(self, config, underlay):
         self.__config = config
@@ -38,11 +38,9 @@
 
     def check_existence(self, key):
         if key in self.ssh.check_call(
-                "{reclass_tools} get-key {key} /srv/salt/reclass/classes"
-                .format(
-                    reclass_tools=self.reclass_tools_cmd,
-                    key=key
-                )):
+                "{reclass_tools} get-key {key} /srv/salt/reclass/classes".
+                format(reclass_tools=self.reclass_tools_cmd,
+                       key=key)):
             LOG.warning("({}) key already exists in reclass".format(key))
             return True
         return False
@@ -66,7 +64,7 @@
                 key=key,
                 value=value,
                 path=short_path
-            ))
+                ))
 
     def get_key(self, key, file_name):
         """Find a key in a YAML
@@ -75,6 +73,10 @@
         :param file_name: name of YAML file to find a key
         :return: str, key if found
         """
+        LOG.info("Try to get '{key}' key from '{file}' file".format(
+            file=file_name,
+            key=key
+            ))
         request_key = self.ssh.check_call(
             "{reclass_tools} get-key {key} /srv/salt/reclass/*/{file_name}".
             format(reclass_tools=self.reclass_tools_cmd,
@@ -91,14 +93,13 @@
         #      '\n']
         # So we have no chance to get value without dirty code like `stdout[3]`
 
-        LOG.info("From reclass.get_key {}".format(request_key))
+        LOG.info("Raw output from reclass.get_key {}".format(request_key))
         if len(request_key) < 4:
-            assert "Can't find {key} in {file_name}. Got stdout {stdout}".\
-                format(
-                    key=key,
-                    file_name=file_name,
-                    stdout=request_key
-                )
+            print("Can't find {key} in {file_name}. Got stdout {stdout}".
+                  format(key=key,
+                         file_name=file_name,
+                         stdout=request_key))
+            return None
         value = request_key[3].strip('\n')
         LOG.info("From reclass.get_key {}".format(value))
         return value