Fix the regex else vtest-init-vserver.sh generates following file

Fix the regex else vtest-init-vserver.sh generates following file

# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client.  You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
exclude=kernel kernel-vserver kernel-devel kernel-headers kernel-debuginfo util-vserver* iptables iproute drupal inotify-tools* libnl
# remarked out baseurl= line instead.
#
#
[...]

and fails;

[...]
Loaded plugins: fastestmirror
Config Error: File contains no section headers.
file: file://///etc/yum.repos.d/CentOS-Base.repo, line: 9
'exclude=kernel kernel-vserver kernel-devel kernel-headers kernel-debuginfo util-vserver* iptables iproute drupal inotify-tools* libnl\n'
++ failure
++ echo 'vtest-init-vserver.sh : Bailing out'
vtest-init-vserver.sh : Bailing out
++ exit 1