image: add rmi image testcases

Signed-off-by: Nlifeng68 <lifeng68@huawei.com>

CI/test_cases/basic_cases/image_remove.bash

+#!/bin/bash
+#
+# attributes: isulad basic image
+# concurrent: NA
+# spend time: 2
+
+curr_path=$(dirname $(readlink -f "$0"))
+data_path=$(realpath $curr_path/../data)
+source ./helpers.bash
+
+do_test_t()
+{
+  echo "test begin"
+
+  isula pull busybox
+  if [ $? -ne 0 ]; then
+    echo "failed pull image"
+    TC_RET_T=$(($TC_RET_T+1))
+  fi
+
+  isula images | grep busybox
+  if [ $? -ne 0 ]; then
+    echo "missing list image busybox"
+    TC_RET_T=$(($TC_RET_T+1))
+  fi
+
+  isula rmi busybox
+  if [ $? -ne 0 ]; then
+    echo "Failed to remove image busybox"
+    TC_RET_T=$(($TC_RET_T+1))
+  fi
+
+  echo "test end"
+  return $TC_RET_T
+}
+
+ret=0
+
+do_test_t
+if [ $? -ne 0 ];then
+  let "ret=$ret + 1"
+fi
+
+show_result $ret "images_remove.bash"