[jvm-packages] update rabit, surface new changes to spark, add parity and failure tests (#4876)

* Expose sets of rabit configurations to spark layer

jvm-packages/create_jni.py

@@ -18,7 +18,7 @@ CONFIG = {
     "USE_HDFS": "OFF",
     "USE_AZURE": "OFF",
     "USE_S3": "OFF",
-
+    "RABIT_MOCK": "OFF",
     "USE_CUDA": "OFF",
     "JVM_BINDINGS": "ON"
 }
@@ -68,6 +68,7 @@ def normpath(path):
 
 
 if __name__ == "__main__":
+    CONFIG["RABIT_MOCK"] = str(sys.argv[1])
     if sys.platform == "darwin":
         # Enable of your compiler supports OpenMP.
         CONFIG["USE_OPENMP"] = "OFF"