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_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.