fix timeout issue in HA

[SenTzu01]

See issue #110140

[zxdavb]

... maybe I could be talked into 30s.

In any case, the actual value should be up to the code using this library (i.e. HA).

[SenTzu01]

From my experience I can tell you 30s will not suffice. 120s was not stable, so I decided to increase to 300 just to be sure.
I expect this issue to arise during bootup of HA on less performing HW, such as RPi3.
Is increasing the timeout from the caller even possible from your codebase?
Anyway, I created a workaround for my personal instance, just thought I'd share my 2 cents.........

[jbouwh]

We have implemented a data coordinator in HA that can handle timeout errors much better. A longer timeout seems not to make sense for me.