spec: unskip flaky cc_exporter spec
spec: unskip flaky cc_exporter spec

closes LS-2168

Test Plan:

passes jenkins

Change-Id: I0cae244037ad806e0fb9e6da7aceafd3e20950a1
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/291962
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>
Product-Review: Jonathan Guardado <94d0a13686225e6d8af5347ed17f9cc0c2643995@instructure.com>
Reviewed-by: Robin Kuss <0b206b54367b2de0334896ea45826f0e3194bd35@instructure.com>
QA-Review: Robin Kuss <0b206b54367b2de0334896ea45826f0e3194bd35@instructure.com>

sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,instructure/canvas-lms