Stored credentials are removed when datalake url changes

ebulk

@@ -222,12 +222,18 @@ function setDataLakeUrl {
       echo >&2; return 1
     fi
     echo "$URL" > "$DATA_LAKE_URL_FILE" 2>/dev/null
+    rm -f ${CREDENTIALS_FILE}
+    echo
+    echo "[INFO] Data-lake url set to '$URL'"
 }
 
 function defaultDataLakeUrl {
   echo "" > "$DATA_LAKE_URL_FILE" 2>/dev/null
   DOWN_URL="$DATA_LAKE_URL/"
   ING_URL="$DATA_LAKE_URL$ING_POLICY"
+  rm -f ${CREDENTIALS_FILE}
+  echo
+  echo "[INFO] Data-lake url set to default '$DATA_LAKE_URL'"
 }
 
 function updateConfigFile {