[COMMON] Fix condition bracket bashisms - step 1

pointed out by checkbashisms

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

$ eval $mycmd

plus fix manually quoting hells induced and bash specific regex
and multi-conditions

Issue-ID: OOM-2643
Signed-off-by: Guillaume Lambert <guillaume.lambert@orange.com>
Change-Id: Ie7ca5b71938fae22c200b7fead418618160fbe19
diff --git a/kubernetes/robot/eteHelm-k8s.sh b/kubernetes/robot/eteHelm-k8s.sh
index 2512e5f..d5e2fa4 100755
--- a/kubernetes/robot/eteHelm-k8s.sh
+++ b/kubernetes/robot/eteHelm-k8s.sh
@@ -44,7 +44,7 @@
 
 ETEHOME=/var/opt/ONAP
 
-if [[ "${!#}" = "execscript" ]]; then
+if [ "${!#}" = "execscript" ]; then
    for script in $(ls -1 "$DIR/$SCRIPTDIR"); do
       [ -f "$DIR/$SCRIPTDIR/$script" ] && [ -x "$DIR/$SCRIPTDIR/$script" ] && source "$DIR/$SCRIPTDIR/$script"
    done