[EFL][WK2] Fix ewk_view_navigation test in EWK2ViewTest

[EFL][WK2] Fix ewk_view_navigation test in EWK2ViewTest
https://bugs.webkit.org/show_bug.cgi?id=132817

Reviewed by Dirk Schulze.

To load test html pages, call ewk_view_uri_set() instead of EWK2UnitTestServer.
Besides this patch adds test html page for ewk_view_navigation unit test.

* UIProcess/API/efl/tests/resources/Page1.html: Added.
* UIProcess/API/efl/tests/resources/Page2.html: Added.
* UIProcess/API/efl/tests/resources/Page3.html: Added.
* UIProcess/API/efl/tests/test_ewk2_view.cpp:
(TEST_F):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@168675 268f45cc-cd09-0410-ab3c-d52691b4dbfc