Given Im rendering an template `/layout/hello.html.erb`, assert_template was
passing with any string that matches. This behavior allowed false passing like:

	assert_template "layout"
	assert_template "out/hello"

Now the passing possibilities are:

	assert_template "layout/hello"
	assert_template "hello"

fixing assert_template bug when template matches expected, but not ends with

Cherry Pick Merge: Fixes issue #3849 assert_template false positive

taking redundant test off

prevening incorrect assert_template when rendering with repeated names in path

updating CHANGELOG with bugfix: assert_template false passing