property: Move property template to its own file

Move the template that generates the property-related code
to its own file out of the interface.mako file so that it's
easier/cleaner to add additional features to the property
template such as error handling.

Tested: Verified the generated code for the example
Calculator remained the same.

Change-Id: Idee37d4b1db6701ffc22de84a7a7ea07a2006d61
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
diff --git a/configure.ac b/configure.ac
index aedae42..9ca9f77 100644
--- a/configure.ac
+++ b/configure.ac
@@ -92,4 +92,5 @@
 AC_CONFIG_FILES([sdbusplus/server.hpp])
 AC_CONFIG_FILES([tools/sdbusplus/templates/interface.mako.server.cpp])
 AC_CONFIG_FILES([tools/sdbusplus/templates/method.mako.prototype.hpp])
+AC_CONFIG_FILES([tools/sdbusplus/templates/property.mako.prototype.hpp])
 AC_OUTPUT