changes for Python 3 compatibility

[hiroshitoda]

including some changes to use collectd-cloudwatch in Python 3 environment like below:

• library name
• encoding/decoding around str type and bytes type

after merging this PR, we can't use this in Python 2 environment.

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[hiroshitoda]

resolved conflictions at 6fadf9a

[aghassemlouei]

Anything that we can do to help merge this into master?

[archoversight]

This is affecting us too, would love to see this resolved. Python 2 was EOL January 1st 2020.

[berenddeboer]

This PR isn't immediately useful as it uses the easy_install command, no clue what that is.

[berenddeboer]

OK, to get that easy_install working, make sure pip is installed on your server.

[nickzakharov]

Any update on this? Would love to be able to use this plugin