cellular doxygen updates

[ghost]

Description

Allow Doxygen generation for CellularConnectionFSM and EasyCellularConnection

Pull request type

• [ X ] Fix

[ghost]

@AnttiKauppila please review

[0xc0170]

/morph build

[mbed-ci]

Build : SUCCESS

Build number : 1411
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/6327/

Triggering tests

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

[mbed-ci]

Test : FAILURE

Build number : 1196
Test logs :http://mbed-os-logs.s3-website-us-west-1.amazonaws.com/?prefix=logs/6327/1196

[mbed-ci]

Exporter Build : SUCCESS

Build number : 1061
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/exporter/6327/

[0xc0170]

/morph test

[mbed-ci]

Test : FAILURE

Build number : 1200
Test logs :http://mbed-os-logs.s3-website-us-west-1.amazonaws.com/?prefix=logs/6327/1200

[0xc0170]

/morph test

[adbridge]

This is a document change how are we getting ci failures ?? !

[cmonr]

@adbridge This particular test has been intermittently failing for a few weeks now, but we don't have a root cause yet.

CC: @studavekar

[mbed-ci]

Test : SUCCESS

Build number : 1203
Test logs :http://mbed-os-logs.s3-website-us-west-1.amazonaws.com/?prefix=logs/6327/1203

[mbed-ci]

Build : ABORTED

Build number : 1423
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/6327/

[cmonr]

Internally stopped a separate build that was not suppose to be triggered.
Build is good, and Test has completed. Merging.