ComponentAccumulator: Allow printing only sequences

Allow printing only sequences in printConfig of ComponentAccumulator.

Also remove seemingly redundant msg.info( "Event Inputs" ).

/cc @fwinkl @tbold

Control/AthenaConfiguration/python/ComponentAccumulator.py

@@ -220,10 +220,9 @@ class ComponentAccumulator(AccumulatorCachable):
     # in the list with a trailing `-', then only the name of the component
     # will be printed, not its properties.
     def printConfig(self, withDetails=False, summariseProps=False,
-                    onlyComponents = [], printDefaults=False, printComponentsOnly=False, prefix=None):
+                    onlyComponents = [], printDefaults=False, printComponentsOnly=False, printSequencesOnly=False, prefix=None):
         msg = logging.getLogger(prefix) if prefix else self._msg
 
-        msg.info( "Event Inputs" )
         msg.info( "Event Algorithm Sequences" )
 
         def printSeqAndAlgs(seq, nestLevel = 0,
@@ -256,6 +255,9 @@ class ComponentAccumulator(AccumulatorCachable):
             msg.info( "Top sequence %d", n )
             printSeqAndAlgs(s, onlyComponents = onlyComponents)
 
+        if printSequencesOnly:
+            return
+
         self.printCondAlgs (summariseProps = summariseProps,
                             onlyComponents = onlyComponents)
         msg.info( "Services" )