Bugfix: ubuntu-server-cloudimg-modify.sh: fix grep syntax with if

https://build.opnfv.org/ci/view/fuel/job/yardstick-fuel-virtual-daily-master/1233/console

+ '[' grep -q trusty /etc/apt/sources.list ']'
/ubuntu-server-cloudimg-modify.sh: line 27: [: too many arguments

If will check exit status itself, we don't need to use test

Change-Id: I3edcf6ef2cbbf888f1089345764a00f9dbd206bd
Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>

diff --git a/tools/ubuntu-server-cloudimg-modify.sh b/tools/ubuntu-server-cloudimg-modify.sh
index ce320a2..b0b0902 100755 (executable)
--- a/tools/ubuntu-server-cloudimg-modify.sh
+++ b/tools/ubuntu-server-cloudimg-modify.sh
@@ -24,7 +24,7 @@ if [ $# -eq 1 ]; then
 fi
 
 # iperf3 only available for trusty in backports
-if [ grep -q trusty /etc/apt/sources.list ]; then
+if grep -q trusty /etc/apt/sources.list ; then
     if [ "${YARD_IMG_ARCH}" = "arm64" ]; then
         echo "deb [arch=${YARD_IMG_ARCH}] http://ports.ubuntu.com/ trusty-backports main restricted universe multiverse" >> /etc/apt/sources.list
     else