Replace Arial with Liberation Sans
Replace Times New Roman with Liberation Serif (except if does not make sense)
Replace Roboto Bk with Liberation Sans
Reduce number of fonts declared

Change-Id: I967818dd6079d43c9b0616541c6c7a7ddac13886
Reviewed-on: https://gerrit.libreoffice.org/51464Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Yousuf Philips <philipz85@hotmail.com>
Reviewed-by: Khaled Hosny <khaledhosny@eglug.org>