Closes #746 - Added extension point for globally adding trace attributes

[JonasKunz]

Closes #746

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This change is 

[mariusoe]

Reviewed 4 of 4 files at r1.
Reviewable status: all files reviewed, 4 unresolved discussions (waiting on @JonasKunz)

a discussion (no related file):
I think the r_httpurlconnection_tracing_start rule should also include at least the r_tracing_global_attributes rule or the the r_http_tracing_default_attributes one?

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inspectit-ocelot-config/src/main/resources/rocks/inspectit/ocelot/config/default/instrumentation/rules/_shared/tracing.yml, line 10 at r1 (raw file):

stack-trace

Do you get the stack-trace? Isn't it just the exception class/name?

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inspectit-ocelot-config/src/main/resources/rocks/inspectit/ocelot/config/default/instrumentation/rules/db/jdbc/tracing.yml, line 42 at r1 (raw file):

          'r_jdbc_extract_url': true
          'r_tracing_global_attributes': true
          'r_tracing_exception_attributes': true

Not also the FQN?

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inspectit-ocelot-config/src/main/resources/rocks/inspectit/ocelot/config/default/instrumentation/rules/http/_shared/http-tracing.yml, line 35 at r1 (raw file):

      'r_http_tracing_default_attributes':
        include:
          'r_tracing_global_attributes': true

Why not also the FQN and exception?

[mariusoe]

Reviewed 3 of 3 files at r2.
Reviewable status: complete! all files reviewed, all discussions resolved