Nepomuk dependency is optional for dolphin but not for its tests

[Frank Reininghaus]

Andriy Rysin:
> When compiling kde-baseapps nepomuk is optional:
> ...
> But not when dolphin tests are considered:
>
> CMake Error: The following variables are used in this project, but they are
> set to NOTFOUND.
> Please set them or make sure they are set and tested correctly in the CMake
> files:
> NEPOMUK_LIBRARIES (ADVANCED)
>    linked by target "dolphinsearchboxtest" in directory
> /home/arysin/work/OSS/KDE/kde-baseapps/dolphin/src/tests
> NEPOMUK_QUERY_LIBRARIES (ADVANCED)
>    linked by target "dolphinsearchboxtest" in directory

I've committed 39ce939709840bd5c783e389bfdb34d8f6eae516 to fix this.
If this does not fix the problem for you, just tell me.

Cheers,
Frank