Reverts to default termination period, and uses bash for "shell form"...

as Alpine's /bin/busybox (ash) does not forward signals, according to
https://pracucci.com/graceful-shutdown-of-kubernetes-pods.html

The reason for the termination period change is that we haven't observed
any termination behavior yet so we can't know how slow it might be.

50kafka.yml

@@ -14,7 +14,7 @@ spec:
         prometheus.io/scrape: "true"
         prometheus.io/port: "5556"
     spec:
-      terminationGracePeriodSeconds: 10
+      terminationGracePeriodSeconds: 30
       containers:
       - name: metrics
         image: solsson/kafka-prometheus-jmx-exporter@sha256:1f7c96c287a2dbec1d909cd8f96c0656310239b55a9a90d7fd12c81f384f1f7d
@@ -35,7 +35,7 @@ spec:
         ports:
         - containerPort: 9092
         command:
-        - sh
+        - /bin/bash
         - -c
         - >
           ./bin/kafka-server-start.sh

zookeeper/50pzoo.yml

@@ -15,7 +15,7 @@ spec:
         prometheus.io/scrape: "true"
         prometheus.io/port: "5556"
     spec:
-      terminationGracePeriodSeconds: 10
+      terminationGracePeriodSeconds: 30
       containers:
       - name: metrics
         image: solsson/kafka-prometheus-jmx-exporter@sha256:1f7c96c287a2dbec1d909cd8f96c0656310239b55a9a90d7fd12c81f384f1f7d
@@ -40,7 +40,7 @@ spec:
         - name: JMX_PORT
           value: "5555"
         command:
-        - sh
+        - /bin/bash
         - -c
         - >
           set -e;

zookeeper/51zoo.yml

@@ -15,7 +15,7 @@ spec:
         prometheus.io/scrape: "true"
         prometheus.io/port: "5556"
     spec:
-      terminationGracePeriodSeconds: 10
+      terminationGracePeriodSeconds: 30
       containers:
       - name: metrics
         image: solsson/kafka-prometheus-jmx-exporter@sha256:1f7c96c287a2dbec1d909cd8f96c0656310239b55a9a90d7fd12c81f384f1f7d
@@ -40,7 +40,7 @@ spec:
         - name: JMX_PORT
           value: "5555"
         command:
-        - sh
+        - /bin/bash
         - -c
         - >
           set -e;