Place yum repo files into a dedicated subdirectory for ease
of management an copying.
Split repo files by server. If a server is down, it won't
cause yum to ignore the remaining repos in the file.
Naming convention for 3rd party repos:
StarlingX_3rd_<munged_server_DNS>.repo
Resulting repo files:
yum.repos.d/StarlingX-Centos-7.2.repo
yum.repos.d/StarlingX-Centos-7.3.repo
yum.repos.d/StarlingX-Centos-7.4.repo
yum.repos.d/StarlingX-Centos-7.5.repo
yum.repos.d/StarlingX-EPEL-7.repo
yum.repos.d/StarlingX_3rd_buildlogs-seed_centos_org.repo
yum.repos.d/StarlingX_3rd_buildlogs_centos_org.repo
yum.repos.d/StarlingX_3rd_download_docker_com.repo
yum.repos.d/StarlingX_3rd_epel_blizoo_mk.repo
yum.repos.d/StarlingX_3rd_ftp_iij_ad_jp.repo
yum.repos.d/StarlingX_3rd_ftp_riken_jp.repo
yum.repos.d/StarlingX_3rd_mirrors_isu_net_sa.repo
yum.repos.d/StarlingX_3rd_www_rpmfind_net.repo
Story: 2003156
Task: 23291
Change-Id: I2a03076a258c1da791cfc4b8ae9699ab7ab634d9
Signed-off-by: Scott Little <scott.little@windriver.com>