Unit Test: Adding unit test cases UsrMgr

This changes set will add needed unit test cases for User Manager

Change-Id: I848cdbde528d41c2a09abcf35527044b6084f023
Signed-off-by: Abhilash Raju <abhilash.kollam@gmail.com>
diff --git a/user_mgr.hpp b/user_mgr.hpp
index b69cb87..752d72e 100644
--- a/user_mgr.hpp
+++ b/user_mgr.hpp
@@ -271,6 +271,12 @@
     void createGroup(std::string groupName) override;
 
     void deleteGroup(std::string groupName) override;
+
+    phosphor::user::Users* getUserObject(const std::string& userName)
+    {
+        return usersList[userName].get();
+    }
+
     MultiFactorAuthType enabled() const override
     {
         return MultiFactorAuthConfigurationIface::enabled();