[MSSQL] Adds a download functionality to mssql_shell.py.#3

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Qazeer wants to merge 2 commits intoAlamot:masterfrom

Commits on Jun 30, 2019

[MSSQL] Adds a download functionality to mssql_shell.py.
Qazeer
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Commits on Jul 1, 2019

[MSSQL] Updates the download functionality with better error handling and MD5 checksum verification
Qazeer
committed