修复修改样例文件配置时重新上传样例文件，下发MD5出错的bug

src/main/java/com/nis/web/dao/configuration/AvCfgDao.xml

@@ -403,6 +403,12 @@
       <if test="samplePath != null and samplePath != ''">
     	sample_path = #{samplePath,jdbcType=VARCHAR},
       </if>
+      <if test="srcMd5 != null and srcMd5 != ''">
+    	src_md5 = #{srcMd5,jdbcType=VARCHAR},
+      </if>
+      <if test="sampleMd5 != null and sampleMd5 != ''">
+    	sample_md5 = #{sampleMd5,jdbcType=VARCHAR},
+      </if>
       </trim>
     </set>
     where cfg_id = #{cfgId,jdbcType=BIGINT}