[meshcop] stop coaps before restart (#3063)
[meshcop] stop coaps before restart (#3063)


jwhui/openthread,LeZhang2016/openthread,turon/openthread,chshu/openthread,LeZhang2016/openthread,jwhui/openthread,gandreello/openthread,openthread/openthread,chshu/openthread,bukepo/openthread,abtink/openthread,lanyuwen/openthread,lanyuwen/openthread,erja-gp/openthread,gandreello/openthread,erja-gp/openthread,erja-gp/openthread,chshu/openthread,gandreello/openthread,abtink/openthread,openthread/openthread,abtink/openthread,srickardti/openthread,erja-gp/openthread,librasungirl/openthread,LeZhang2016/openthread,srickardti/openthread,lanyuwen/openthread,gandreello/openthread,librasungirl/openthread,bukepo/openthread,gandreello/openthread,lanyuwen/openthread,turon/openthread,erja-gp/openthread,chshu/openthread,librasungirl/openthread,openthread/openthread,lanyuwen/openthread,turon/openthread,turon/openthread,abtink/openthread,LeZhang2016/openthread,bukepo/openthread,LeZhang2016/openthread,openthread/openthread,jwhui/openthread,librasungirl/openthread,jwhui/openthread,srickardti/openthread,bukepo/openthread,LeZhang2016/openthread,lanyuwen/openthread,gandreello/openthread,erja-gp/openthread,chshu/openthread,chshu/openthread,srickardti/openthread