Tests don't pass under windows

[atoulme]

Some tests do not work well under Windows:

org.apache.tuweni.hobbits.UDPTest > testTwoEndpoints(Vertx) FAILED
   Caused by: java.net.BindException
org.apache.tuweni.hobbits.UDPTest > testTwoUDPConnections(Vertx) FAILED
   Caused by: java.net.BindException
org.apache.tuweni.hobbits.RelayerTest > testUDPRelay(Vertx) FAILED
   java.lang.NullPointerException at RelayerTest.kt:101
17 tests completed, 3 failed, 1 skipped
Task :io:test
org.apache.tuweni.io.ResourcesTest >
shouldIterateResourcesOnFileSystemAndInJars(Path) FAILED
   java.lang.RuntimeException at ResourcesTest.java:96
       Caused by: java.net.URISyntaxException at ResourcesTest.java:96
19 tests completed, 1 failed
Task :kv:test
org.apache.tuweni.kv.MapDBKeyValueStoreSpec > describe a MapDB-backed key
value store FAILED
   java.nio.file.FileSystemException at KeyValueStoreSpec.kt:202
55 tests completed, 1 failed```