BUG/MINOR: sample: Rename SenderComID/TargetComID to SenderCompID/TargetCompID

The recently introduced Financial Information eXchange (FIX)
converters have some hard coded tags based on the specification that
were misspelled. Specifically, SenderComID and TargetComID should
be SenderCompID and TargetCompID according to the specification [1][2].

This patch updates all references, which includes the converters
themselves, the regression test, and the documentation.

[1] https://fiximate.fixtrading.org/en/FIX.5.0SP2_EP264/tag49.html
[2] https://fiximate.fixtrading.org/en/FIX.5.0SP2_EP264/tag56.html
diff --git a/doc/configuration.txt b/doc/configuration.txt
index 1f5d605..f0801aa 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -15650,7 +15650,7 @@
   from the tag <tag>. <tag> can be a string or an integer pointing to the
   desired tag. Any integer value is accepted, but only the following strings
   are translated into their integer equivalent: BeginString, BodyLength,
-  MsgType, SenderComID, TargetComID, CheckSum. More tag names can be easily
+  MsgType, SenderCompID, TargetCompID, CheckSum. More tag names can be easily
   added.
 
   Due to current HAProxy design, only the first message sent by the client and