[201811][utilities][swss][snmpagent] advance sub module head

snmpagent
* 187aa10 2021-09-16 | [201811][RFC1213]: Initialize lag oid map in reinit_data (sonic-net#233) (github/201811) [SuvarnaMeenakshi]

swss:
* 3503705 2021-09-05 | [201811][Cherry-pick] [acl mirror action] Mirror session ref count fix at acl rule attachment (sonic-net#1898) (HEAD -> 201811, github/201811) [bingwang-ms]

utilities:
* f3f8667 2021-10-15 | [201811] disk_check.py: Allow remote user access when disk is read-only (sonic-net#1873) (HEAD -> 201811, github/201811) [Renuka Manavalan]
* 6b351c9 2021-10-14 | [201811]  Remove exec from platform_reboot_plugin call to handle any hang issue. (sonic-net#1880) [Sujin Kang]
* d8d0461 2021-07-29 | [minigraph][port_config] Consume port_config.json while reloading minigraph (sonic-net#1726) [Blueve]

Signed-off-by: Ying Xie <ying.xie@microsoft.com>