...instead of static WeakReference and getGlobalMutex.  The latter allowed for
deadlock, when one thread is in __getTypeEntries
(cppuhelper/source/implbase_ex.cxx), having locked getImplHelperInitMutex(), and
from there calls some cppu_detail_getUnoType (from a cppumaker-generated header)
that tries to lock getGloblaMutex, while another thread is in this
FactoryImpl_create, having locked getGlobalMutex, and from there calls into
__getTypeEntries.

Change-Id: Iac68d28c1a5971049447cc79384b6e186f2a6d82