Rename YAML parser

Rename to pdmgen.py in the spirit of phosphor-inventory-manager.

Change-Id: Iaa0a2dadb8c051342e62c9126e5c7b7bef2fcdde
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/src/Makefile.am b/src/Makefile.am
index 233b610..44590c2 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -19,4 +19,4 @@
 CLEANFILES = generated.cpp
 
 generated.cpp:
-	$(AM_V_GEN)$(PYTHON) ${srcdir}/gen-group-defs.py -y ${srcdir}/example/monitoring_defs.yaml -o ${builddir}
+	$(AM_V_GEN)$(PYTHON) ${srcdir}/pdmgen.py -y ${srcdir}/example/monitoring_defs.yaml -o ${builddir}
diff --git a/src/gen-group-defs.py b/src/pdmgen.py
similarity index 100%
rename from src/gen-group-defs.py
rename to src/pdmgen.py