Submodule sonic-py-swsssdk update

2cd6236 [voq][chassis] Fix for issue in chassis redis server connection check (sonic-net#110)
9da577d [port_util] Fix issue in function get_interface_oid_map (sonic-net#114)
740a44c [port_util] Allow system without ports in config db run without errors (sonic-net#109)
d07682e Merge pull request sonic-net#111 from xumia/azp-coverage
482cac2 [Ethernet-IB][index] Modifed the port_util to support the VoQ Inband Port (sonic-net#113)
69eac92 Support azp diff coverage

Signed-off-by: liora <liora@nvidia.com>