Lora: Fix sticky MAC command retransmissions

[kivaisan]

Description

This commit fixes the bug where sticky MAC commands were duplicated in
send buffer everytime send() was called.

Pull request type

[X] Fix
[ ] Refactor
[ ] Target update
[ ] Functionality change
[ ] Breaking change

[kivaisan]

@hasnainvirk @AnttiKauppila @kjbracey-arm please review.

[hasnainvirk]

Looks good.

[0xc0170]

Can you rebase? We will start CI

[kivaisan]

@0xc0170 Rebased.

[0xc0170]

/morph build

[mbed-ci]

Build : SUCCESS

Build number : 3115
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/8096/

Triggering tests

/morph test
/morph export-build
/morph mbed2-build

[mbed-ci]

Exporter Build : SUCCESS

Build number : 2722
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/exporter/8096/

[cmonr]

@kivaisan @hasnainvirk Are the functions in this file not meant to be used by application developers?

19d90bd#diff-73c4e0f308c58824d9bfaeb1900924fc

[mbed-ci]

Test : SUCCESS

Build number : 2908
Test logs :http://mbed-os-logs.s3-website-us-west-1.amazonaws.com/?prefix=logs/8096/2908

[kivaisan]

@cmonr These are our stack internal methods, so supposed to be used by application directly.

[0xc0170]

@cmonr These are our stack internal methods, so supposed to be used by application directly.

It's worth stating in the commit msg, to avoid later questioning the release version.

[kivaisan]

Sorry, just noticed one critical typo in my earlier comment, so NOT supposed to be used by application directly.