Merge branch 'release/v2.7.4' into develop
New command tool to create phonebooks/contacts for stress testing
create_phonebook_stresstest up to 100k contact
update TODO
Lua : fixes on the FSM
update footer
add 'stop campaign action' on campaign list
refactor stop campaign code
update version v2.7.5
Merge branch 'release/v2.7.5'