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/ipaddress.hpp b/src/ipaddress.hpp
index 3ed551a..b78b677 100644
--- a/src/ipaddress.hpp
+++ b/src/ipaddress.hpp
@@ -11,7 +11,7 @@
 namespace network
 {
 
-using IPIfaces = sdbusplus::server::object::object<
+using IPIfaces = sdbusplus::server::object_t<
     sdbusplus::xyz::openbmc_project::Network::server::IP,
     sdbusplus::xyz::openbmc_project::Object::server::Delete>;
 
@@ -45,7 +45,7 @@
      *  @param[in] prefixLength - Length of prefix.
      *  @param[in] gateway - gateway address.
      */
-    IPAddress(sdbusplus::bus::bus& bus, const char* objPath,
+    IPAddress(sdbusplus::bus_t& bus, const char* objPath,
               EthernetInterface& parent, IP::Protocol type,
               const std::string& ipAddress, IP::AddressOrigin origin,
               uint8_t prefixLength, const std::string& gateway);