SSDM-3510 add explicite declaration of jython 2.7

...servers/basynthec/datastore_server/etc/service.properties

...t/servers/basynthec/openBIS-server/etc/service.properties

...st/servers/common/datastore_server/etc/service.properties

...t/servers/common/datastore_server2/etc/service.properties

js-test/servers/common/openBIS-server/etc/service.properties

js-test/servers/dsu/datastore_server/etc/service.properties

js-test/servers/dsu/openBIS-server/etc/service.properties

.../servers/novartis/datastore_server/etc/service.properties

...st/servers/novartis/openBIS-server/etc/service.properties

.../servers/yeastlab/datastore_server/etc/service.properties

...st/servers/yeastlab/openBIS-server/etc/service.properties