cast redis ports to int

[qeternity]

What does this pull request do?

It appears possible in at least some versions of the python redis libraries (redis-py and aioredis) to end up with ports that are stored as strings, whereas apm-server is expecting an int, which results in parsing issues. This preemptively casts all redis ports to ints before building the destination info.

[apmmachine]

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• Start Time: 2022-07-21T18:09:23.489+0000

• Duration: 28 min 50 sec

Test stats 🧪

Test	Results
Failed	0
Passed	4922
Skipped	3455
Total	8377

💚 Flaky test report

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[basepi]

/test

[basepi]

Looks good to me! Thanks for adding this.

[apmmachine]

🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (68/68)	💚
Files	100.0% (227/227)	💚
Classes	100.0% (227/227)	💚
Lines	89.62% (17251/19249)	👍
Conditionals	76.771% (3143/4094)	👍

[basepi]

/test linters