[submodule][master] Update submodule sonic-mgmt-common to the latest HEAD automatically

[mssonicbld]

Why I did it

src/sonic-mgmt-common

* 9a12683 - (HEAD -> master, origin/master, origin/HEAD) Made following APIs TABLE List name agnostic. 1. sortDepTables 2. GetOrderedDepTables 3. GetOrderedTables Also fixed following issues in the above APIs 1. Missing Nodes(toposort) when Table has multiple lists. 2. Inconsistent comparison (few places list names where compared with    table name) 3. Inconsistent I/O. These functions were designed to work on Lists but    it accepted table names and due to which inconsistent results were    observed. Fixed the behavior the I/O is always TABLE NAME but    internally it gets converted to LIST and processed. It is done    because there is a possibility of having an dependency between TABLE    LIST. 4. Optimise the code. (9 hours ago) [Mohammed Faraaz]
* 7795bbb - CVL Infra Enhancments and Fixes (9 hours ago) [Mohammed Faraaz]
* 2bb6dbc - CVL Infra Enhancments and Fixes (9 hours ago) [Mohammed Faraaz]

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