Neither Cassandra nor Elasticsearch starts reliably on Windows. This
commit adds a custom class rule to the associated sample application
tests to skip them on Windows. A class rule is used rather than a
Unit assumption as we want to avoid starting Elasticsearch (done by
the application context) and Cassandra (done by a test execution
listener) and an assumption would be too late.
The integration tests for the Spring Data Cassandra sample application
fail intermittently, apparently due to Cassandra failing to start
within the default timeout period of 10000ms.
In attempt to get the tests to pass reliably, this commit increases
the timeout to 60000ms (1 minute).
