Signed-off-by: Guohan Lu <gulv@microsoft.com>

sonic-utilities:
* 8b98d45 2021-05-25 | [show] support for show muxcable firmware version of only active banks (sonic-net#1629) (HEAD -> 202012) [vdahiya12]
* afd0975 2021-05-20 | [show] add support for muxcable metrics (sonic-net#1615) [vdahiya12]

sonic-swss
* 7611df5 2021-05-27 | [tunneldecaporch] Set default MTU for the overlay loopback interface (sonic-net#1756) (HEAD -> 202012) [Volodymyr Samotiy]
* 22fbb5c 2021-05-27 | [202012] Resolve neighbor when nexthop does not exist (sonic-net#1759) (github/202012) [Shi Su]
* ec7710c 2021-05-27 | [Bulk mode] Limit the size of bulker (sonic-net#1760) [Shi Su]

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

sonic-utilities:
* 8b98d45 2021-05-25 | [show] support for show muxcable firmware version of only active banks (#1629) (HEAD -> 202012) [vdahiya12]
* afd0975 2021-05-20 | [show] add support for muxcable metrics (#1615) [vdahiya12]

sonic-swss
* 7611df5 2021-05-27 | [tunneldecaporch] Set default MTU for the overlay loopback interface (#1756) (HEAD -> 202012) [Volodymyr Samotiy]
* 22fbb5c 2021-05-27 | [202012] Resolve neighbor when nexthop does not exist (#1759) (github/202012) [Shi Su]
* ec7710c 2021-05-27 | [Bulk mode] Limit the size of bulker (#1760) [Shi Su]

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

Why I did it
Update sonic-utilities submodule to include below commits:
29f4a16 Global and Interface commands for IPv6 Link local address enhancements (#1159)
a99d56d Improve config error handling on version_info (#1760)
5002745 Load the database global_db. (#1752)
Signed-off-by: Suvarna Meenakshi <sumeenak@microsoft.com>

88a38f7 Ignore ALREADY_EXIST error in FDB creation (#1815)
b1c23f3 Change rif_rates.lua and port_rates.lua scripts to calculate rates correct (#1848)

Update sonic-utilities submodule with

cbc25d6 [config reload] Call systemctl reset-failed for snmp,telemetry,mgmt-framework services (#1773)
04dcd07 Improve config error handling on version_info (#1760)
e567a60 Load the database global_db. (#1752)
c15fb8f [sfputil] Gracefully handle improper 'specification_compliance' field (#1741)
39350f8 [dhcp_relay] Update CLI reference document and add a new API for ip address type (#1717)
18f13c6 [sonic-package-manager] switch from poetry-semver to semantic_version due to bugs found in poetry-semver (#1710)
b16724a [voq][chassis] VOQ cli show commands implementation (#1689)
9427cd6 [debug dump util] Match Infrastructure (#1666)
d9fb39b [route_check] Filter out VNET routes (#1612)

#### What I did
`get_sonic_version_info()` may return `None` if `/etc/sonic/sonic_version.yml` does not exist. Previously the `config` exit without any useful information.

Some `config` subcommands do not depend on sonic version info, we should allow them to run.