selenium: removes .click from fba in common.rb
selenium: removes .click from fba in common.rb

- fba stands for find by attribute
- removing .click makes the method a pure find

Change-Id: I5849593df602b0b29de6f5ce80ea2d1497be623e
Reviewed-on: https://gerrit.instructure.com/52113
Reviewed-by: Pedro Fajardo <121b528f0c2f2e923ce3103793aca31b9a662ac4@instructure.com>
Tested-by: Jenkins
Product-Review: Caleb Guanzon <54fa1f30d451e4f3c341a8f3c47c9215fd0be9c6@instructure.com>
QA-Review: Caleb Guanzon <54fa1f30d451e4f3c341a8f3c47c9215fd0be9c6@instructure.com>

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