netipmid: use std::shared_ptr instead of weak_ptr/lock

All of the instances of getSession and startSession were assigning the
result to a local shared_ptr via lock on the weak_ptr. It doesn't make
sense to demote the shared_ptr (from the sessionsMap) to a weak_ptr via
the return, only to promote to a shared_ptr again via lock.

Tested-by: running ipmitool -H a.b.c.d -P 0penBmc -I lanplus mc info
           Sessions start and stop, same as before.

Change-Id: Ic10779285891d73ee51115f16ed0000b38d1c52a
Signed-off-by: Vernon Mauery <vernon.mauery@linux.intel.com>
diff --git a/command/rakp34.cpp b/command/rakp34.cpp
index 76236d5..84c90fc 100644
--- a/command/rakp34.cpp
+++ b/command/rakp34.cpp
@@ -16,8 +16,7 @@
 void applyIntegrityAlgo(const uint32_t bmcSessionID)
 {
     auto session =
-        (std::get<session::Manager&>(singletonPool).getSession(bmcSessionID))
-            .lock();
+        std::get<session::Manager&>(singletonPool).getSession(bmcSessionID);
 
     auto authAlgo = session->getAuthAlgo();
 
@@ -45,8 +44,7 @@
 void applyCryptAlgo(const uint32_t bmcSessionID)
 {
     auto session =
-        (std::get<session::Manager&>(singletonPool).getSession(bmcSessionID))
-            .lock();
+        std::get<session::Manager&>(singletonPool).getSession(bmcSessionID);
 
     auto authAlgo = session->getAuthAlgo();
 
@@ -96,10 +94,9 @@
     std::shared_ptr<session::Session> session;
     try
     {
-        session = (std::get<session::Manager&>(singletonPool)
-                       .getSession(
-                           endian::from_ipmi(request->managedSystemSessionID)))
-                      .lock();
+        session =
+            std::get<session::Manager&>(singletonPool)
+                .getSession(endian::from_ipmi(request->managedSystemSessionID));
     }
     catch (std::exception& e)
     {