Improve code coverage for ModelsListEmpty

[brarrow]

CC improved to 100%
Is it good? Or need to change something?

[coveralls]

Coverage increased (+0.04%) to 64.743% when pulling f80d8f5 on greenbarrow:feature-191 into aa5d60b on malinink:dev.

[malinink]

@greenbarrow https://stackoverflow.com/questions/4449728/how-can-i-do-unit-test-for-hashcode
Please look at comment below, it is important too

assertNotSame(obj1, obj2); // don't cheat
assertEquals(obj1.hashcode(), obj2.hashcode());

[brarrow]

I think, there is no way in that class to prove that obj1.hashcode() equals obj2.hashcode.
Because ModelsListEmpty objects always have different hashcodes. Even in case of the same objects declaration. Also in each test it have different hashcodes.