[pull] master from Azure:master#22

Merged

pull[bot] merged 3 commits intopphuchar:masterfrom

sonic-net:master

Apr 17, 2019

Commits on Apr 17, 2019

[snmp.service] Make swss.service a requisite (#2790)

stepanblyschak
authored and
qiluo-msft
committed
[dockers]: Upgrade SNMP docker to stretch build (#2620)

samaity
authored and
qiluo-msft
committed
teamd: lacp: update port state according to partner's sync bit (#2793)
pavel-shirshov
authored