skip flaky variable_expander spec
skip flaky variable_expander spec

flag = none
refs SOS-1808

Change-Id: Ib1bc1633c09cc0448559b6a397c358f6f6a02659
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/252027
Reviewed-by: Andrea Cirulli <b4e55ef5ee4bae8ad31f7c81009bfc0af1714a1f@instructure.com>
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>
QA-Review: Ryan Norton <65299b45178f94900ff304765e8fbf07bd13b331@instructure.com>
Product-Review: Ryan Norton <65299b45178f94900ff304765e8fbf07bd13b331@instructure.com>

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