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/phosphor-ldap-config/ldap_mapper_entry.cpp b/phosphor-ldap-config/ldap_mapper_entry.cpp
index b9442e3..af57e2d 100644
--- a/phosphor-ldap-config/ldap_mapper_entry.cpp
+++ b/phosphor-ldap-config/ldap_mapper_entry.cpp
@@ -23,7 +23,7 @@
     sdbusplus::xyz::openbmc_project::Common::Error::InvalidArgument;
 using Argument = xyz::openbmc_project::Common::InvalidArgument;
 
-LDAPMapperEntry::LDAPMapperEntry(sdbusplus::bus::bus& bus, const char* path,
+LDAPMapperEntry::LDAPMapperEntry(sdbusplus::bus_t& bus, const char* path,
                                  const char* filePath,
                                  const std::string& groupName,
                                  const std::string& privilege, Config& parent) :
@@ -36,7 +36,7 @@
     Interfaces::emit_object_added();
 }
 
-LDAPMapperEntry::LDAPMapperEntry(sdbusplus::bus::bus& bus, const char* path,
+LDAPMapperEntry::LDAPMapperEntry(sdbusplus::bus_t& bus, const char* path,
                                  const char* filePath, Config& parent) :
     Interfaces(bus, path, Interfaces::action::defer_emit),
     id(std::stol(std::filesystem::path(path).filename())), manager(parent),