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: Ie7375047bd567aa052d3bd35a6dd7008779a05b4
diff --git a/src/bmccontrolservices.cpp b/src/bmccontrolservices.cpp
index b2b9610..e30c4a9 100644
--- a/src/bmccontrolservices.cpp
+++ b/src/bmccontrolservices.cpp
@@ -63,7 +63,7 @@
             serviceCfgMgr = ipmi::getService(*sdbusp, objectManagerIntf,
                                              serviceConfigBasePath);
         }
-        catch (const sdbusplus::exception::exception& e)
+        catch (const sdbusplus::exception_t& e)
         {
             serviceCfgMgr.clear();
             phosphor::logging::log<phosphor::logging::level::ERR>(
@@ -156,7 +156,7 @@
             }
         }
     }
-    catch (const sdbusplus::exception::exception& e)
+    catch (const sdbusplus::exception_t& e)
     {
         return ipmi::responseUnspecifiedError();
     }
@@ -189,7 +189,7 @@
             }
         }
     }
-    catch (const sdbusplus::exception::exception& e)
+    catch (const sdbusplus::exception_t& e)
     {
         return ipmi::responseUnspecifiedError();
     }