sdbusplus: use shorter type aliases

The sdbusplus headers provide shortened aliases for many types.
Switch to using them to provide better code clarity and shorter
lines.  Possible replacements are for:
  * bus_t
  * exception_t
  * manager_t
  * match_t
  * message_t
  * object_t
  * slot_t

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ief1b330c4f623ecc1be771f36083780a12260834
diff --git a/src/ibm/hypervisor-network-mgr-src/hyp_network_manager.hpp b/src/ibm/hypervisor-network-mgr-src/hyp_network_manager.hpp
index 5616c66..ca21ece 100644
--- a/src/ibm/hypervisor-network-mgr-src/hyp_network_manager.hpp
+++ b/src/ibm/hypervisor-network-mgr-src/hyp_network_manager.hpp
@@ -68,7 +68,7 @@
      *  @param[in] event - event.
      *  @param[in] path - Path to attach at.
      */
-    HypNetworkMgr(sdbusplus::bus::bus& bus, sdeventplus::Event& event,
+    HypNetworkMgr(sdbusplus::bus_t& bus, sdeventplus::Event& event,
                   const char* path) :
         bus(bus),
         event(event), objectPath(path){};
@@ -141,7 +141,7 @@
     void setBIOSTableAttrs();
 
     /** @brief sdbusplus DBus bus connection. */
-    sdbusplus::bus::bus& bus;
+    sdbusplus::bus_t& bus;
 
     /**  sdevent Event handle. */
     sdeventplus::Event& event;