increase selenium script_timeout
increase selenium script_timeout

Change-Id: I35576c076551d1a619351cbd0903181b2caa04e7
Reviewed-on: https://gerrit.instructure.com/7640
Reviewed-by: Zach Wily <9de8c4480303b5335cd2a33eefe814615ba3612a@instructure.com>
Tested-by: Hudson <dfb64870173313a9a7b56f814c8e3b33e268497a@instructure.com>

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