Zulip: 10s delay before message is sent

[imolein]

Describe the bug Since v1.23.1 messages from Zulip are sent with a delay of 10s, because the first event request fails. After the 10s timeout (introduced in #1589) matterbridge receives the message.

To Reproduce In my case:

• Update matterbridge to version newer or equal v1.23.1
• Write a message in Zulip
  • the first event request fails at every message

Expected behavior Messages are sent directly.

Screenshots/debug logs

time="2022-08-02T14:37:03+02:00" level=debug msg="receiving error: <nil>" func=handleQueue file="bridge/zulip/zulip.go:129" prefix=zulip
time="2022-08-02T14:37:13+02:00" level=debug msg="== Receiving gozulipbot.EventMessage{...}" func=handleQueue file="bridge/zulip/zulip.go:136" prefix=zulip

Environment (please complete the following information):

• OS: Ubuntu 20.04.4
• Matterbridge version: 1.25.2 20f841c5

Additional context

• Zulip version: 5.5
• Matterbridge config:

[discord]
	[discord.channel]
	Token=""
	Server=""
	RemoteNickFormat="{NICK}"
	ShowEmbeds=true
	EditSuffix=" (edited)"

[zulip]
	[zulip.channel]
	Token=""
	Login=""
	Server=""
	RemoteNickFormat="**{NICK}**: "

[[gateway]]
name="zulipdiscord"
enable=true

[[gateway.inout]]
account="discord.channel"
channel="ID:0000"

[gateway.inout.options]
WebhookURL=""

[[gateway.inout]]
account="zulip.channel"
channel="Channel/topic:DiscordBridge"