give atleast MASTERNODE_SENTINEL_PING_MAX_SECONDS/2 seconds to propogate
give atleast MASTERNODE_SENTINEL_PING_MAX_SECONDS/2 seconds to propogate


Former-commit-id: c9e79f9604898fd9207b8090fcd653dce4511169
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin