pdmgen: Require uppercase meta keys

journald ignores lowercase metadata keys so require them
to be uppercase.  Abort the config file parse when lowercase
keys are found.

Change-Id: Icffffdc6680b4d305329c3395f8e2fda6210964f
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/src/test/yaml/propertygentest/grouptwo.yaml b/src/test/yaml/propertygentest/grouptwo.yaml
index 4f2db02..9b86bba 100644
--- a/src/test/yaml/propertygentest/grouptwo.yaml
+++ b/src/test/yaml/propertygentest/grouptwo.yaml
@@ -5,10 +5,10 @@
   members:
     - interface: xyz.openbmc_project.Test.Iface6
       property: Foo
-      meta: property1
+      meta: PROPERTY1
     - interface: xyz.openbmc_project.Test.Iface1
       property: Value
-      meta: property2
+      meta: PROPERTY2
 
 - name: test property group 3
   class: group
@@ -17,10 +17,10 @@
   members:
     - interface: xyz.openbmc_project.Test.Iface3
       property: Bar
-      meta: property1
+      meta: PROPERTY1
     - interface: xyz.openbmc_project.Test.Iface2
       property: Value
-      meta: property2
+      meta: PROPERTY2
     - interface: xyz.openbmc_project.Test.Iface6
       property: Baz
-      meta: property3
+      meta: PROPERTY3