Changes

ctf.core: Set parent/child in data stream and event record nodes

Set the parent/child relationships of the immediate children of
JsonDataStreamMetadataNode and JsonEventRecordMetadataNode during their
initialization.

[Fixed] Set parent/child in data stream and event record nodes

Change-Id: I9374b49588aef38b518e8fb14915abbda65b316a
Signed-off-by: Patrick Tasse <patrick.tasse@gmail.com>
Reviewed-on: https://git.eclipse.org/r/c/tracecompass/org.eclipse.tracecompass/+/204822
Tested-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
Tested-by: Trace Compass Bot <tracecompass-bot@eclipse.org>
Reviewed-by: Matthew Khouzam <matthew.khouzam@ericsson.com>

ctf.core: Support field class alias in CTF2 Metadata

Allow field-class-alias fragments in root metadata node.

Add new class FieldClass to be used instead of JsonObject. Create and
register a FieldClassDeserializer that will accept a JSON Object as a
field class or a JSON String as a field class alias and lookup a
previously occurring field class alias with that name.

Support a string as a field class alias in TypeAliasParser and lookup a
previously occurring field class alias with that name in the Metadata
root.

[Added] Support field class alias in CTF2 Metadata

Change-Id: I7a7cf52a1ce36ba726ba2ab568ed6e9b9cfc4803
Signed-off-by: Patrick Tasse <patrick.tasse@gmail.com>
Reviewed-on: https://git.eclipse.org/r/c/tracecompass/org.eclipse.tracecompass/+/204823
Tested-by: Trace Compass Bot <tracecompass-bot@eclipse.org>
Tested-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
Reviewed-by: Matthew Khouzam <matthew.khouzam@ericsson.com>

linux.core: Add priority/thread name statistics data provider factory

This commit creates a new data provider for the new priority/thread name
statistics analysis by extending the
AbstractSegmentStoreStatisticsDataProviderFactory class. The data
provider has a private class called PriorityThreadNameStatisticsAnalysis
which specifies that entries for the priority/thread name statistics
analysis should be grouped by priority and thread name.

[Added] Data provider factory for priority/thread name statistics
analysis

Change-Id: Id5ad6a8301e1188916f0abc40006c11045b54976
Signed-off-by: Hoang Thuan Pham <hoang.pham@calian.ca>
Reviewed-on: https://git.eclipse.org/r/c/tracecompass/org.eclipse.tracecompass/+/204382
Tested-by: Trace Compass Bot <tracecompass-bot@eclipse.org>
Tested-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
Reviewed-by: Patrick Tasse <patrick.tasse@gmail.com>
Reviewed-by: Matthew Khouzam <matthew.khouzam@ericsson.com>