FAB-16290 Make metadata fields lower case

As part of the effort to homogonize the package structure, the key names
will (soon) be required to be lower case.  This CR simply modifies the
generated metadata keys to conform to this standard.

Change-Id: Ida23c333c9bbe33d60afb1e6667cba19813b5656
Signed-off-by: Jason Yellick <jyellick@us.ibm.com>

Author: Jason Yellick

src/main/java/org/hyperledger/fabric/sdk/LifecycleChaincodePackage.java

@@ -327,7 +327,7 @@ static byte[] generatePackageMataDataBytes(String label, String path, Transactio
         if (path == null) {
             path = "";
         }
-        return format("{\"Path\":%s,\"Type\":\"%s\",\"Label\":%s}", new Gson().toJson(path), type.toPackageName(), new Gson().toJson(label)).getBytes(UTF_8);
+        return format("{\"path\":%s,\"type\":\"%s\",\"label\":%s}", new Gson().toJson(path), type.toPackageName(), new Gson().toJson(label)).getBytes(UTF_8);
     }
 
     public JsonObject getMetaInfJson() throws IOException {
@@ -380,7 +380,7 @@ public TransactionRequest.Type getType() throws IOException {
         JsonObject metaInfJson = getMetaInfJson();
         if (null != metaInfJson) {
 
-            String type = metaInfJson.containsKey("Type") ? metaInfJson.getString("Type") : null;
+            String type = metaInfJson.containsKey("type") ? metaInfJson.getString("type") : null;
             if (null != type) {
 
                 return TransactionRequest.Type.fromPackageName(type);
@@ -393,7 +393,7 @@ public String getLabel() throws IOException {
         JsonObject metaInfJson = getMetaInfJson();
         if (null != metaInfJson) {
 
-            String label = metaInfJson.containsKey("Label") ? metaInfJson.getString("Label") : null;
+            String label = metaInfJson.containsKey("label") ? metaInfJson.getString("label") : null;
             if (null != label) {
 
                 return label;
@@ -406,7 +406,7 @@ public String getPath() throws IOException {
         JsonObject metaInfJson = getMetaInfJson();
         if (null != metaInfJson) {
 
-            return metaInfJson.containsKey("Path") ? metaInfJson.getString("Path") : null;
+            return metaInfJson.containsKey("path") ? metaInfJson.getString("path") : null;
         }
         return null;
     }

src/test/java/org/hyperledger/fabric/sdk/LifecycleChaincodePackageTest.java

@@ -45,8 +45,8 @@ public void testGoLangCode() throws Exception {
         assertTrue(lifecycleChaincodePackage.getAsBytes().length > 1);
 
         JsonObject metaInfJson = lifecycleChaincodePackage.getMetaInfJson();
-        Assert.assertEquals(metaInfJson.getString("Path"), "github.com/example_cc");
-        Assert.assertEquals(metaInfJson.getString("Type"), "golang");
+        Assert.assertEquals(metaInfJson.getString("path"), "github.com/example_cc");
+        Assert.assertEquals(metaInfJson.getString("type"), "golang");
         Assert.assertEquals(lifecycleChaincodePackage.getType(), TransactionRequest.Type.GO_LANG);
         Assert.assertEquals(lifecycleChaincodePackage.getPath(), "github.com/example_cc");
         Assert.assertEquals(lifecycleChaincodePackage.getLabel(), "mylabel");