Merge branch 'patch-1' of https://github.com/KaiUweHueber-TRUMPF/open… #899

Job	Run time
Build Java Client JDK8 (samples/client/echo_api/java/apache-httpclient)	1m 5s
Build Java Client JDK8 (samples/client/echo_api/java/resteasy)	55s
Build Java Client JDK8 (samples/client/echo_api/java/feign-gson)	1m 2s
Build Java Client JDK8 (samples/client/echo_api/java/resttemplate)	1m 8s
Build Java Client JDK8 (samples/client/echo_api/java/okhttp-gson)	1m 1s
	5m 11s

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