resource.get now returns a model, even if it is disabled
Merge branch 'get_model_disabled'
generate dialplan only if line is activated
use 'contains' matcher instead of 'has_length'

more elegant, and works with generators
do not generate sccp line config when line is disabled
rename join_line_protocol to convert_to_model
replace field with equivalent but more explicit one
Merge branch '4862_disable_line'