Move object_mapper per dbus path conventions.

Partial fix for openbmc/openbmc#1112.

Change-Id: I964620e7b741dffbf5a680ae775f371a28143860
Signed-off-by: Leonel Gonzalez <lgonzalez@us.ibm.com>
diff --git a/configure.ac b/configure.ac
index 2ad9855..bd80240 100644
--- a/configure.ac
+++ b/configure.ac
@@ -59,7 +59,7 @@
 # Add defines to config header
 AC_DEFINE([MAPPER_BUSNAME], ["xyz.openbmc_project.ObjectMapper"], [Object mapper bus name])
 AC_DEFINE([MAPPER_INTERFACE], ["xyz.openbmc_project.ObjectMapper"], [Object mapper interface])
-AC_DEFINE([MAPPER_PATH], ["/xyz/openbmc_project/ObjectMapper"], [Object mapper DBUS path])
+AC_DEFINE([MAPPER_PATH], ["/xyz/openbmc_project/object_mapper"], [Object mapper DBUS path])
 
 # Workaround for unpatched systemd installs
 AC_ARG_ENABLE([unpatched-systemd],