[COMMON] Fix a few bashisms

pointed out by checkbashisms:
- variable name HOSTNAME
- source instead of .
- variable increments
- sleep with suffix

And migrate a few shebangs to /bin/sh

Issue-ID: OOM-2643
Signed-off-by: Guillaume Lambert <guillaume.lambert@orange.com>
Change-Id: I82981bcff17e88cf824935b841ce37a585ddde00
diff --git a/kubernetes/sdnc/components/sdnc-prom/resources/bin/ensureSdncActive.sh b/kubernetes/sdnc/components/sdnc-prom/resources/bin/ensureSdncActive.sh
index feb6662..099103c 100755
--- a/kubernetes/sdnc/components/sdnc-prom/resources/bin/ensureSdncActive.sh
+++ b/kubernetes/sdnc/components/sdnc-prom/resources/bin/ensureSdncActive.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
-{{/*
 
+{{/*
 # Copyright © 2018 Amdocs
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/kubernetes/sdnc/components/sdnc-prom/resources/bin/ensureSdncStandby.sh b/kubernetes/sdnc/components/sdnc-prom/resources/bin/ensureSdncStandby.sh
index 9485833..05a1701 100755
--- a/kubernetes/sdnc/components/sdnc-prom/resources/bin/ensureSdncStandby.sh
+++ b/kubernetes/sdnc/components/sdnc-prom/resources/bin/ensureSdncStandby.sh
@@ -1,6 +1,6 @@
-#!/bin/bash
-{{/*
+#!/bin/sh
 
+{{/*
 # Copyright © 2018 Amdocs
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/kubernetes/sdnc/resources/geo/bin/switchVoting.sh b/kubernetes/sdnc/resources/geo/bin/switchVoting.sh
index 65b7626..a276854 100755
--- a/kubernetes/sdnc/resources/geo/bin/switchVoting.sh
+++ b/kubernetes/sdnc/resources/geo/bin/switchVoting.sh
@@ -1,6 +1,6 @@
-#!/bin/bash
-{{/*
+#!/bin/sh
 
+{{/*
 # Copyright © 2018 Amdocs
 #
 # Licensed under the Apache License, Version 2.0 (the "License");