Create multiple session and verify

Changes:
    - Added set session key function in lib.
    - Added get session info function in lib utils.
    - Added test case to create 50 session and verify.

Tested: On Master

Change-Id: Iaf740c83d77fb1da7be65903872219e21b53c79e
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/lib/bmc_redfish.py b/lib/bmc_redfish.py
index 92001c9..d0f22a3 100644
--- a/lib/bmc_redfish.py
+++ b/lib/bmc_redfish.py
@@ -64,8 +64,27 @@
                                              password=self._password_,
                                              default_prefix=self._default_prefix_)
         self._robj_.login(auth=redfish.AuthMethod.SESSION)
+        self._session_key_ = self._robj_.get_session_key()
         self._session_location_ = self._robj_.get_session_location()
 
+    def set_session_key(self, session_key):
+        r"""
+        Update the session key instance.
+
+        session_key      Redfish valid session key.
+        """
+        self._robj_.set_session_key(session_key)
+
+    def set_session_location(self, session_location):
+        r"""
+        Update the session location instance.
+
+        session_location   Redfish valid session location.
+                           Example:
+                           /redfish/v1/SessionService/Sessions/j04tD83QQn
+        """
+        self._robj_.set_session_location(session_location)
+
     def get(self, resource_path, *args, **kwargs):
         r"""
         Perform a GET request and return response.
diff --git a/lib/bmc_redfish_utils.py b/lib/bmc_redfish_utils.py
index 832da44..daa09e1 100644
--- a/lib/bmc_redfish_utils.py
+++ b/lib/bmc_redfish_utils.py
@@ -17,6 +17,21 @@
         # Obtain a reference to the global redfish object.
         self._redfish_ = BuiltIn().get_library_instance('redfish')
 
+    def get_redfish_session_info(self):
+        r"""
+        Returns redfish sessions info dictionary.
+
+        {
+            'key': 'yLXotJnrh5nDhXj5lLiH' ,
+            'location': '/redfish/v1/SessionService/Sessions/nblYY4wlz0'
+        }
+        """
+        session_dict = {
+            "key": self._redfish_._session_key_,
+            "location": self._redfish_._session_location_
+        }
+        return session_dict
+
     def get_attribute(self, resource_path, attribute):
         r"""
         Get resource attribute.