Use 0.0.0.0 as coupler' default address as anyway Beremiz' IntegrationTests...

Use 0.0.0.0 as coupler' default address as anyway Beremiz' IntegrationTests are meant to be run on same machine (coupler <-> runner).

Beremiz/beremiz_test_opc_ua/opcua_0@opcua/confnode.xml

 <?xml version='1.0' encoding='utf-8'?>
-<OPCUAClient xmlns:xsd="http://www.w3.org/2001/XMLSchema" Server_URI="opc.tcp://k2-osie:4840"/>
+<OPCUAClient xmlns:xsd="http://www.w3.org/2001/XMLSchema" Server_URI="opc.tcp://0.0.0.0:4840"/>

Beremiz/beremiz_test_opc_ua/plc.xml

 <?xml version='1.0' encoding='utf-8'?>
 <project xmlns:ns1="http://www.plcopen.org/xml/tc6_0201" xmlns:xhtml="http://www.w3.org/1999/xhtml" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://www.plcopen.org/xml/tc6_0201">
   <fileHeader companyName="Unknown" productName="Unnamed" productVersion="1" creationDateTime="2021-05-14T14:33:11"/>
-  <contentHeader name="Counter (OSIE)" modificationDateTime="2021-12-02T17:20:52">
+  <contentHeader name="Counter (OSIE)" modificationDateTime="2021-12-21T13:24:52">
     <coordinateInfo>
       <fbd>
         <scaling x="0" y="0"/>