KOP-2139 KOP-2445 setup: Reduce and refactor code from xta-client-example-lib

pom.xml

src/main/java/de/ozgcloud/xta/client/XtaClient.java

src/main/java/de/ozgcloud/xta/client/XtaClientFactory.java

.../java/de/ozgcloud/xta/client/config/HttpClientPolicy.java

src/main/java/de/ozgcloud/xta/client/config/HttpProxy.java

src/main/java/de/ozgcloud/xta/client/config/Keystore.java

...n/java/de/ozgcloud/xta/client/config/XtaClientConfig.java

...java/de/ozgcloud/xta/client/config/XtaClientSettings.java

...ava/de/ozgcloud/xta/client/config/XtaConfigValidator.java

.../xta/client/core/EmptyNamespaceMessageOutInterceptor.java

.../de/ozgcloud/xta/client/core/ManagementServiceClient.java

...cloud/xta/client/core/ManagementServiceClientBuilder.java

...java/de/ozgcloud/xta/client/core/MsgBoxServiceClient.java

.../ozgcloud/xta/client/core/MsgBoxServiceClientBuilder.java

...n/java/de/ozgcloud/xta/client/core/SendServiceClient.java

...de/ozgcloud/xta/client/core/SendServiceClientBuilder.java

...main/java/de/ozgcloud/xta/client/core/ServiceBuilder.java

src/main/java/de/ozgcloud/xta/client/core/VersionInfo.java

src/main/java/de/ozgcloud/xta/client/core/WsClient.java

...main/java/de/ozgcloud/xta/client/core/WsClientConfig.java