Fix hypervisor system Get

The reason for this change is that there are two routes defined:
[1] /redfish/v1/Systems/<str> in systems.hpp
[2] /redfish/v1/Systems/hypervisor in hypervisor_system.hpp

Whenever a user does a get on /redfish/v1/Systems/hypervisor, the first
route is hit and that checks if <str> is "system" and if not, bmcweb
returns resource not found error.

```
Error:
ERROR - Members: GET of resource at URI /redfish/v1/Systems/hypervisor returned HTTP error. Check URI.
ERROR - URI did not return resource /redfish/v1/Systems/hypervisor
  	GET Failure HTTP Code (404)
```

The below upstream commit is causing this issue:
[1] openbmc/bmcweb@22d268c#diff-cddfc26fddb6ba29f3fd81ecf5840fc6d9a8554bbca92f578d81b97db8b14895

To resolve this issue, an if hypervisor is inserted in the
/redfish/v1/Systems/<str> and that calls handleHypervisorSystemGet. The
/redfish/v1/Systems/hypervisor in redfish-core/lib/hypervisor_system.hpp
is removed.

Also fix /redfish/v1/Systems/hypervisor/ResetActionInfo/.

Redfish validator passed.
redfish/v1/Systems/hypervisor looks good.
/redfish/v1/Systems/hypervisor/ResetActionInfo/ looks good.

Change-Id: Ie2d9d19c258236ce86d6552ae4a3bd486e02de01
Signed-off-by: Asmitha Karunanithi <asmitk01@in.ibm.com>
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/redfish-core/lib/systems.hpp b/redfish-core/lib/systems.hpp
index 6174610..a38cc3a 100644
--- a/redfish-core/lib/systems.hpp
+++ b/redfish-core/lib/systems.hpp
@@ -19,6 +19,7 @@
 #include "dbus_singleton.hpp"
 #include "dbus_utility.hpp"
 #include "health.hpp"
+#include "hypervisor_system.hpp"
 #include "led.hpp"
 #include "pcie.hpp"
 #include "query.hpp"
@@ -2942,6 +2943,13 @@
         {
             return;
         }
+
+        if (systemName == "hypervisor")
+        {
+            handleHypervisorSystemGet(asyncResp);
+            return;
+        }
+
         if (systemName != "system")
         {
             messages::resourceNotFound(asyncResp->res, "ComputerSystem",
@@ -3231,6 +3239,13 @@
         {
             return;
         }
+
+        if (systemName == "hypervisor")
+        {
+            handleHypervisorResetActionGet(asyncResp);
+            return;
+        }
+
         if (systemName != "system")
         {
             messages::resourceNotFound(asyncResp->res, "ComputerSystem",