BUG Rosmodel-Parser not working as expected with Services

[pglr]

Description

Running the Rosmodel-parser with Service-Clients and Servers results in wrong results.

Steps to reproduce:

1. Create Rosmodel with the rosmodel-generator
2. Add subs,pubs,action-cli & server as well as service-cli & server
3. output it as a file
4. parse that file with the rosmodel_parser

Expected behaviour:

All interfaces should show up (pubs, subs, ...):

Rosmodel Parser
Package name: ['test_pkg']
Artifact name: ['test_artifact']
Node name: ['test_node']

Publishers: 
    Name: ['my_pub1'] Type: ['std_msgs.Bool']
Subscribers: 
    Name: ['my_sub2'] Type: ['std_msgs.String']
Service Servers: 
    Name: ['add_two_ints3'] Type: ['example_interface.AddTwoInts']
Service Clients: 
    Name: ['add_two_ints4'] Type: ['example_interface.AddTwoInts']
Action Servers: 
    Name: ['navigate/bot'] Type: ['nav2_msgs.TestThis']
Action Clients: 
    Name: ['navigate'] Type: ['nav2_msgs.NavigateToPose']

Actual behaviour:

Rosmodel Parser
Package name: ['test_pkg']
Artifact name: ['test_artifact']
Node name: ['test_node']

Service Servers: 
    Name: ['add_two_ints3'] Type: ['example_interface.AddTwoInts']
Service Clients: 
    Name: ['add_two_ints4'] Type: ['example_interface.AddTwoInts']

Error/Bug:

Finally found the error to be how the model gets saved into the file and how the parser expects it to be structured. These two don't match so the parser only parses a part of the model.

Rosmodel-Parser Code

Ros-metamodel-core Code

Solution:

Rearange the expected structure inside the rosmodel-parser to meet the metamodel definition :