Purpose: Fix HDFFV-8367
Description:
    - Added wrappers to CommomFG for H5Oget_info_by_name() to get a child
      object's type (requested by user)
        H5O_type_t childObjType(const H5std_string& objname) const;
        H5O_type_t childObjType(const char* objname) const;
        H5O_type_t childObjType(hsize_t index, H5_index_t index_type=H5_INDEX_NAME, H5_iter_order_t order=H5_ITER_INC, const char* objname=".") const;
    - Added tests to tobject.cpp
Platforms tested:
    Linux/ppc64 (ostrich)
    Linux/32 2.6 (jam)
    SunOS 5.11 (emu)



git-svn-id: https://svn.hdfgroup.uiuc.edu/hdf5/trunk@24983 dab4d1a6-ed17-0410-a064-d1ae371a2980