Update commonalities glossary with HomeDevicesQoD-subproject relevant terms

[shilpa-padgaonkar]

camaraproject/WorkingGroups#120

[rartych]

In order to integrate the common glossary in Commonalities it is needed to provide the first version of subproject relevant terms by 15th of March - it can be placed in this issue within the following table:

Term	Description	Usage in API (Parameter/Field)	Alternative developer-friendly terms

[jpengar]

Term	Description	Usage in API (Parameter/Field)	Alternative developer-friendly terms
Service Class	A statement of the required QoS characteristics of a traffic aggregate. Conceptually, a service class refers to applications with similar characteristics and performance requirements. Each service class is mapped to a DSCP value according to RFC4594 guidelines. The DSCP value is used to classify the target home device's traffic so that it can be treated accordingly (i.e. to meet its QoS needs).	service_class

[monamok]

"service_class" was replaced by "serviceClass" due to the new version of approved guidelines and the decision that was made in issue#157 discussion.

[shilpa-padgaonkar]

@monamok : The glossary is already merged in commonalities and changes for serviceClass are already in.
Thanks for providing the inputs to the glossary

https://github.com/camaraproject/WorkingGroups/blob/main/Commonalities/documentation/Glossary.md