Tests modification for windows CI (#9671)

* Fixing and disabling some tests for windows 10 compatibility.

* Few adjustment for windows in tests (eg bigger timeout for keyserver tests)

* Spaces and temporary single thread ci (to be able to spot the error).

ethcore/light/src/cache.rs

@@ -186,7 +186,7 @@ mod tests {
 
 		{
 			let corpus_time = &mut cache.corpus.as_mut().unwrap().1;
-			*corpus_time = *corpus_time - Duration::from_secs(6 * 3600);
+			*corpus_time = *corpus_time - Duration::from_secs(5 * 3600);
 		}
 		assert!(cache.gas_price_corpus().is_none());
 	}