Use a longer timeout when probing TCP coordinators

[puddly]

Multi-PAN specifically takes too long and fails to probe most of the time. This is independent from connect, which works correctly.

[MattWestb]

That i think its one good fix !!!!

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (82452ba) 99.76% compared to head (c834d9c) 99.76%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## dev #564 +/- ## ======================================= Coverage 99.76% 99.76% ======================================= Files 62 62 Lines 4594 4602 +8 ======================================= + Hits 4583 4591 +8 Misses 11 11 ``` | [Impacted Files](https://app.codecov.io/gh/zigpy/bellows/pull/564?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=zigpy) | Coverage Δ | | |---|---|---| | [bellows/ezsp/\_\_init\_\_.py](https://app.codecov.io/gh/zigpy/bellows/pull/564?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=zigpy#diff-YmVsbG93cy9lenNwL19faW5pdF9fLnB5) | `99.19% <100.00%> (+0.02%)` | :arrow_up: |

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