Change header name based on upstream changes

CMakeLists.txt

cmake/FindRing.cmake

src/certificate.cpp

src/qtwrapper/callmanager_wrap.h

src/qtwrapper/configurationmanager_wrap.h

src/qtwrapper/instancemanager_wrap.h

src/qtwrapper/presencemanager_wrap.h

src/qtwrapper/videomanager_wrap.h