[COMMON] Revert "[COMMON] Fix a few bashisms"

This reverts commit 62178a49cc9e4088019d426636657d9f2980d242.

This commit introduced regression on portal db config job which is now
unable to start:

/usr/local/bin/docker-entrypoint.sh: line 114: syntax error near unexpected token `('

Issue-ID: OOM-1
Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Change-Id: I3cb72cd7625b180b364b713fe942d5956736ebef
diff --git a/kubernetes/robot/ete-k8s.sh b/kubernetes/robot/ete-k8s.sh
index 01cf092..15d07fb 100755
--- a/kubernetes/robot/ete-k8s.sh
+++ b/kubernetes/robot/ete-k8s.sh
@@ -78,7 +78,7 @@
 
 if [ "${!#}" = "execscript" ]; then
    for script in $(ls -1 "$DIR/$SCRIPTDIR"); do
-      [ -f "$DIR/$SCRIPTDIR/$script" ] && [ -x "$DIR/$SCRIPTDIR/$script" ] && . "$DIR/$SCRIPTDIR/$script"
+      [ -f "$DIR/$SCRIPTDIR/$script" ] && [ -x "$DIR/$SCRIPTDIR/$script" ] && source "$DIR/$SCRIPTDIR/$script"
    done
 fi