Zeebe gRPC client.waitForReady always fails

[jwulf]

[Identified with a fix here]

In GrpcClient.ts, this call:

this.client.waitForReady(10000, (error) =>
	error
		? this.emit(MiddlewareSignals.Event.Error, error)
		: this.emit(MiddlewareSignals.Event.Ready)
)

always throws an error, because the first parameter needs to be an absolute time, not an offset.

So, it should be:

this.client.waitForReady(new Date(Date.now() + 10000), (error) =>
	error
		? this.emit(MiddlewareSignals.Event.Error, error)
		: this.emit(MiddlewareSignals.Event.Ready)
)

[jwulf]

This fix changes the behaviour of the SDK in the following way:

Before	After
Does not set connected: true if there is a broker and eagerConnection: false	Sets connected: true if there is a broker and eagerConnection: false
Sets connected: false if there is no broker and no setting of eagerConnection	Sets connected: undefined if there is no broker and no setting of eagerConnection