Enhance error message for TSO start response parsing

Improve error handling by providing more context in the exception message when parsing the TSO start response fails.

Signed-off-by: Frank Giordano <giofr01@yahoo.com>

Author: frankgiordano

src/main/java/zowe/client/sdk/zostso/methods/TsoStart.java

@@ -100,7 +100,9 @@ public TsoStartResponse start(final StartTsoInputData inputData) throws ZosmfReq
         try {
             rootNode = objectMapper.readTree(responseStr);
         } catch (JsonProcessingException e) {
-            throw new ZosmfRequestException(e.getMessage(), e);
+            throw new ZosmfRequestException(
+                    "Failed to parse TSO start response: " + responseStr + " | Error: " + e.getMessage(), e
+            );
         }
 
         final JsonNode keyNode = rootNode.get("servletKey");