fix default Iroha config

Signed-off-by: Alexey-N-Chernyshov <[email protected]>

Author: Alexey-N-Chernyshov

testcontainers/src/main/java/jp/co/soramitsu/iroha/testcontainers/detail/IrohaConfig.java

@@ -43,7 +43,7 @@ public class IrohaConfig implements Cloneable {
   private int max_proposal_size = 1000;
 
   @Builder.Default
-  private int proposal_delay = 1000;
+  private int proposal_delay = 5000;
 
   @Builder.Default
   private int vote_delay = 1000;