[UPDATE] ubuntu: Move gitconfig into project head

Signed-off-by: Jeff Yu <jeff_yu@pegatroncorp.com>
[FIX] ubuntu: Fix apt-get install stop

Signed-off-by: Jeff Yu <jeff_yu@pegatroncorp.com>
[UPDATE] ubuntu: Remove old config file before make link

Signed-off-by: Jeff Yu <jeff_yu@pegatroncorp.com>