Create widgets in beforeEach
Create widgets in beforeEach

Previously, one set of widgets was created for the whole test suite.
This caused problems when adding them to the container created in
beforeEach, because the widgets were already in a container from the
previous test.

[endlessm/eos-sdk#3054]

endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib