Fix MAttributeExtensionId module
Fix MAttributeExtensionId module

MAttributeExtensionId is in server instead of plugins module. Move it
from PLUGIN_HEADERS/SOURCES to SEVER_HEADERS/SOURCES.

RevBy: TrustMe

Elleo/framework,jpetersen/framework,Elleo/framework,jpetersen/framework,binlaten/framework,RHawkeyed/framework,RHawkeyed/framework