Merge branch 'fe-fix-diffs-specs-leaking-store' into 'master'

app/assets/javascripts/mr_notes/stores/index.js

app/assets/javascripts/mr_notes/stores/modules/index.js

spec/javascripts/diffs/components/compare_versions_spec.js

.../javascripts/diffs/components/diff_expansion_cell_spec.js

spec/javascripts/diffs/components/diff_file_spec.js

...scripts/diffs/components/diff_line_gutter_content_spec.js

.../javascripts/diffs/components/diff_line_note_form_spec.js

spec/javascripts/diffs/components/diff_table_cell_spec.js

...cripts/diffs/components/inline_diff_expansion_row_spec.js

...avascripts/diffs/components/inline_diff_table_row_spec.js

spec/javascripts/diffs/components/inline_diff_view_spec.js

...ipts/diffs/components/parallel_diff_expansion_row_spec.js

spec/javascripts/diffs/components/parallel_diff_view_spec.js