Add: set multiple MAC in one BTDEVADDR feature

[hanhsuan]

Description

Describe your changes here:

BTDEVADDR could not set multiple BT MAC addresses at the same time. It will make automatic testing failed, if the test BT server be occupied or not available.

The only impact job is com.canonical.plainbox::bluetooth/bluetooth_obex_send.

Setting of BTDEVADDR is changing from

BTDEVADDR = 28:3A:4D:46:79:C0

to

BTDEVADDR = 28:3A:4D:46:79:C0,7C:B2:7D:4B:14:95,34:6F:24:A8:93:EE,80:32:53:D8:0D:1E

Resolved issues

• LP1909208: suspend/bluetooth_obex_send_after_suspend_auto needs more retries if the server side is busy #175
• Jira card CQT-2031

Documentation

• Automated tests are included for the changed functionality in this PR. If to be merged without tests, please elaborate why.
• Necessary documentation is provided for the changed functionality in this PR (tests are documentation, too).

Tests

• Only setting one Mac address
• First one Mac address could be used
• Latest one Mac address could be used
• One of the Mac address could be used
• All Mac address could not be used

[kissiel]

Looks good. One minor English fix below.

[hanhsuan]

I'm so sorry I rebased to wrong commit. Should I drop this PR then create a new one?

[kissiel]

git reset the branch to the commit you want to keep, and repush your branch. This will delete the unwanted ones.

If there's problem with your order then you can reset your branch to the same commit as the main ref is pointing to and then cherry-pick only the commits you want to have. And then of course repush.

[hanhsuan]

I have fixed it. Thanks for you help.

[yphus]

small typo

[pieqq]

Thanks for providing a link to all the different test cases you've tested, it's really helpful!

Looks good to me.

change requests have been addressed