Allow parametrization of web connector created within TS execution

During execution of TS there is new 'https' connector created for several testcases. This connector has hardcoded protocol value HTTP/1.1 which means use JIO conector (org.apache.coyote.http11.Http11Protocol), this is done in https://source.jboss.org/browse/JBossWS/container/jboss72/tags/jbossws-jboss720-4.3.0.Final/tests-integration/src/main/java/org/jboss/as/webservices/deployer/RemoteDeployer.java?r=18419#to273

If we want to test with NIO connector enabled (org.apache.coyote.http11.Http11NioProtocol), we can do it only by changing already existing connectors before TS execution, but not for the new ones created during execution.

The simple solution here is to allow overriding connector protocol class by system property.