eeschema: Eagle imported pins set to "Unspecified"

Report split from lp:1808578

The project HydraBus with eagle files required for this issue is open hardware and available on github in following link:
https://github.com/hydrabus/hydrabus/tree/master/hardware/HydraBus_1_0_Rev1_3
The interest in this project is it is not too complex and could be a very good point for KiCad in order to improve the EAGLE CAD Import

When we import this project with KiCad 6.0 nightly of even KiCad 5.0x there is different issues
So let's do it step by step with KiCad nightly kicad-r11991-11Dec2018 (http://downloads.kicad-pcb.org/windows/nightly/kicad-r11991.9490fd9d3-x86_64.exe)
1) git clone https://github.com/hydrabus/hydrabus.git to hydrabus_git

2) Launch KiCad and Import Eagle Project Files => Choose hydrabus_git\hardware\HydraBus_1_0_Rev1_3\HydraBus_1_0_Rev1_3.brd

3) Choose project destination (create directory HydraBus_1_0_Rev1_3_Kicad) => hydrabus_git\hardware\HydraBus_1_0_Rev1_3_Kicad
kicad Information open with lot of warning about tKeepout(39) which is converted to Dwgs.User layer
As KiCad does not support KeepOut it is OK and it is minor issue
so click on OK
Now the board is displayed correctly so save it

4) Open Eeschema and run ERC. Many pins are set to "Unspecified" which causes ERC errors.

Application: kicad
Version: (6.0.0-rc1-dev-1390-g0a2638890-dirty), release build
Libraries:
    wxWidgets 3.0.4
Platform: Linux 4.18.0-3-amd64 x86_64, 64 bit, Little endian, wxGTK
Build Info:
    wxWidgets: 3.0.4 (wchar_t,wx containers,compatible with 2.8) GTK+ 3.24
    Boost: 1.67.0
    OpenCASCADE Community Edition: 6.9.1
    Compiler: GCC 8.2.0 with C++ ABI 1013

Build settings:
    USE_WX_GRAPHICS_CONTEXT=OFF
    USE_WX_OVERLAY=OFF
    KICAD_SCRIPTING=ON
    KICAD_SCRIPTING_MODULES=ON
    KICAD_SCRIPTING_PYTHON3=OFF
    KICAD_SCRIPTING_WXPYTHON=ON
    KICAD_SCRIPTING_WXPYTHON_PHOENIX=OFF
    KICAD_SCRIPTING_ACTION_MENU=ON
    BUILD_GITHUB_PLUGIN=OFF
    KICAD_USE_OCE=ON
    KICAD_USE_OCC=OFF
    KICAD_SPICE=ON