Bug 10653: (follow-up) minor tweaks to RotatingCollections tests

Bug 10653: (follow-up) minor tweaks to RotatingCollections tests

- remove unnecessary module import
- use parentheses for all C4 function calls

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
(cherry picked from commit 40aa42f31f10acad92da5f2c57319f049fba9289)
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>
(cherry picked from commit 800e1fc6d059b59a6aa0f5f0353c64ea1b606560)
Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
(cherry picked from commit 800e1fc6d059b59a6aa0f5f0353c64ea1b606560)
Signed-off-by: Chris Hall <followingthepath@gmail.com>
(cherry picked from commit d5cc7da52ac6d6e0fd21662c4f3ebc24c22d511b)