Rtti.pp unit is not thread safe
<h3><details><summary>Original Reporter info from Mantis: <small>imants_gulbis</small></summary><small> - **Reporter name:** Imants Gulbis </small></details></h3> ## Description: I attached patch for fixing some problems with using rtti unit in multiple threads. Specially I got problems with GetParameters, GetDeclaredMethods and GetProperties methods they time to time raised 'A RTTI object with handle 0x%x is already registered' error and sometimes it created more than one TPoolToken for same context which caused problems with GRttiPool ## Mantis conversion info: - **Mantis ID:** 37302 - **Version:** 3.3.1
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