fix(coap-core): fix 202 http status mapping to coap code

Author: szysas

coap-core/src/main/java/com/mbed/coap/packet/Code.java

@@ -111,6 +111,7 @@ public static Code fromHttp(int httpStatus, Method method) {
         switch (httpStatus) {
             // SUCCESS (2.xx)
             case 200:
+            case 202: // Closest semantic match is to use same code as 200
                 switch (method) {
                     case PUT:
                     case POST:
@@ -124,8 +125,6 @@ public static Code fromHttp(int httpStatus, Method method) {
                 }
             case 201:
                 return C201_CREATED;
-            case 202:
-                return C204_CHANGED; // Closest semantic match
             case 204:
                 if (method == Method.DELETE) {
                     return C202_DELETED;

coap-core/src/test/java/com/mbed/coap/packet/CodeTest.java

@@ -109,6 +109,7 @@ public void shouldConvertHttpToCoapCode() {
         assertEquals(Code.C202_DELETED, fromHttp(200, DELETE));
         assertEquals(Code.C201_CREATED, fromHttp(201, POST));
         assertEquals(Code.C204_CHANGED, fromHttp(202, POST));
+        assertEquals(Code.C202_DELETED, fromHttp(202, DELETE));
         assertEquals(Code.C202_DELETED, fromHttp(204, DELETE));
 
         assertEquals(Code.C203_VALID, fromHttp(304, GET));