[EFL][DRT] Call resetInternalsObject() after each test.

[EFL][DRT] Call resetInternalsObject() after each test.
https://bugs.webkit.org/show_bug.cgi?id=86793

Reviewed by Antonio Gomes.

We need to reset the internals object's settings after running
each test so that there are no interferences between each test's
results.

Source/WebKit/efl:

* WebCoreSupport/DumpRenderTreeSupportEfl.cpp:
(DumpRenderTreeSupportEfl::globalContextRefForFrame):
* WebCoreSupport/DumpRenderTreeSupportEfl.h:

Tools:

* DumpRenderTree/efl/DumpRenderTree.cpp:
(runTest):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@117540 268f45cc-cd09-0410-ab3c-d52691b4dbfc