[COMMON] Fix condition equality bashisms

pointed out by checkbashisms.

$ mycmd=$(tox -e checkbashisms | grep "(should be 'b = a')" | sed -e
  "s@^[^.]*\(.[^ ]*\) line \([0-9]*\) .*@sed -i -e '\2s/==/=/g' \1;@")

$ eval $mycmd

Issue-ID: OOM-2643
Signed-off-by: Guillaume Lambert <guillaume.lambert@orange.com>
Change-Id: I9032130bc4717e111de11a73187c2f1052376e45
diff --git a/kubernetes/contrib/dns-server-for-vhost-ingress-testing/deploy_dns.sh b/kubernetes/contrib/dns-server-for-vhost-ingress-testing/deploy_dns.sh
index 657b5f9..1a75bd7 100755
--- a/kubernetes/contrib/dns-server-for-vhost-ingress-testing/deploy_dns.sh
+++ b/kubernetes/contrib/dns-server-for-vhost-ingress-testing/deploy_dns.sh
@@ -86,9 +86,9 @@
 	target_machine_notice_info
 }
 
-if [[ $# -eq 1 ]] && [[ $1 == "-h" || $1 == "--help" ]]; then
+if [[ $# -eq 1 ]] && [[ $1 = "-h" || $1 = "--help" ]]; then
 	usage
-elif [[ $# -eq 1 ]] && [[ $1 == "--info" ]]; then
+elif [[ $# -eq 1 ]] && [[ $1 = "--info" ]]; then
        target_machine_notice_info
 else
 	deploy $@