Adds instrumentation for aiomcache

[jairhenrique]

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Overview

Adds support to aiomcache instrumentation.

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[jairhenrique]

@TimPansino @lrafeei I tried to replicate the bmcache tests, but I couldn't understand why the tests are failing. Can you guide me?

[lrafeei]

Hello @jairhenrique --Thanks for the submission! As for the test failures, it’s just a typo causing the issue. In lines 53 and 91 in tests/datastore_aiomemcache/test_aiomemcache.py, the expected transaction metric is set to test_aiomcache:test_... and the filename is test_aiomemcache.py—to stay consistent, let’s change the filename to test_aiomcache.py

[jairhenrique]

@lrafeei thanks!! I ran the tests locally and they now pass!