GRANT rights to CURRENT_USER instead of adding roles

Stephen Frost <sfrost@snowman.net>

Commit: 6928484bda454f9ab2456d385b2d317f18b6bf1a
Author: Stephen Frost <sfrost@snowman.net>
Date: 2016-04-07T18:40:23Z
Releases: 9.6.0
GRANT rights to CURRENT_USER instead of adding roles

We shouldn't be adding roles during the regression tests as that can
cause back-to-back installcheck runs to fail and users running the
regression tests likley don't want those extra roles.

Pointed out by Tom

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