Fix host state checking logic

Resolves openbmc/bmcweb#12

Testing: Verified this with system booted against
redfish/v1/Systems/motherboard:
  "PowerState": "On",
  "Status": {
    "State": "Enabled"
  },
and this with system powered off:
  "PowerState": "Off",
  "Status": {
    "State": "Disabled"
  },

Change-Id: I0acbf0992d730e4a5189d9af962370277f59eaaa
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/redfish-core/lib/systems.hpp b/redfish-core/lib/systems.hpp
index ebe455e..3d7c931 100644
--- a/redfish-core/lib/systems.hpp
+++ b/redfish-core/lib/systems.hpp
@@ -460,7 +460,7 @@
             if (s != nullptr)
             {
                 // Verify Host State
-                if (*s == "xyz.openbmc_project.State.Host.Running")
+                if (*s == "xyz.openbmc_project.State.Host.HostState.Running")
                 {
                     aResp->res.jsonValue["PowerState"] = "On";
                     aResp->res.jsonValue["Status"]["State"] = "Enabled";