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: I19e094a2a99893627dbb82b615f630b87ad90fdd
diff --git a/user_mgr.hpp b/user_mgr.hpp
index f5aac22..23278ed 100644
--- a/user_mgr.hpp
+++ b/user_mgr.hpp
@@ -35,8 +35,7 @@
 using AccountPolicyIface =
     sdbusplus::xyz::openbmc_project::User::server::AccountPolicy;
 
-using Ifaces =
-    sdbusplus::server::object::object<UserMgrIface, AccountPolicyIface>;
+using Ifaces = sdbusplus::server::object_t<UserMgrIface, AccountPolicyIface>;
 
 using Privilege = std::string;
 using GroupList = std::vector<std::string>;
@@ -78,7 +77,7 @@
      *  @param[in] bus  - sdbusplus handler
      *  @param[in] path - D-Bus path
      */
-    UserMgr(sdbusplus::bus::bus& bus, const char* path);
+    UserMgr(sdbusplus::bus_t& bus, const char* path);
 
     /** @brief create user method.
      *  This method creates a new user as requested
@@ -189,7 +188,7 @@
 
   private:
     /** @brief sdbusplus handler */
-    sdbusplus::bus::bus& bus;
+    sdbusplus::bus_t& bus;
 
     /** @brief object path */
     const std::string path;