Fix issues reported by SonarCloud

Ignore false positivies compilation errors on GCC on arm

Set project and build version to 2.2.5.15

Change dependency includes

Include headers by "" instead of <> so the local headers are prefered
over the headers installed in system directories.

discovery: allow to ignore resource in batch responses

Use OC_IGNORE response code to ignore resource in batch responses
or notifications.

Validate CoAP request before processing

- validation is executed before processing
- some data parsed during the validation is stored and passed to processing
to avoid duplicate parsing

ri: process request before call a resource handler

Split unpublish request into multiple requests

When attempting to unpublish multiple resource links the query
can exceed the allowed COAP COAP_MAX_HEADER_SIZE limit.
To avoid this issue the query is split between mutliple requests
when necessary.

Fix issues reported by SonarCloud

cloud: remove loggin flag when manager starts