Occassionally, the database backend may experience a deadlock error
in the normal course of operations.
It is standard practice to have the database client retry the
operation.
If retries continue to fail, eventually return to user with 500
error and description.
Closes-Bug: 1746139
Change-Id: Iffc9344d22d1b3c0408eca3cef11767bafd2c7c2