Clustering TS: Support testing against different Infinispan Server distributions

Currently, the testsuite's pom.xml downloads a specific upstream version and tests against it. The goal of this Jira is to allow for testing with different distributions such as custom builds of Infinispan Server or productised builds. This probably needs to look like this, all controlled by parameters:

(1) download datagrid distribution maven plugin execution is disabled
(2) datagrid is provisioned from a local file/directory
(3) datagrid server profile is provided from a local directory
(4) Optionally: infinispan server driver version is overridden by a parameter.

Note that the code to run only these tests is already in place with a specific maven profile.