Back-fill caps, dsn_comms, major_events ?

[taldcroft]

These event types are sometimes updated in iFOT after ingest into kadi. E.g. in ska_test/packages/kadi/write_events_cmds.py there is code that specifically ignores them for this reason. For instance between 2016:212 and 2016:230 there are some diffs:

diff -r test flight
diff -r test/caps.ecsv flight/caps.ecsv
16c16
< 523307 2016:216:11:37:33 2016:216:11:39:59 586611521.184 586611667.184 146.0 425I "EIA Sequencer-A Self Test"   

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> 523307 2016:216:09:45:04.991 2016:216:09:45:04.991 586604773.175 586604773.175 0.0 425I "EIA Sequencer-A Self Test"   
diff -r test/dsn_comms.ecsv flight/dsn_comms.ecsv
25d24
< 527439 2016:216:11:20:00.000 2016:216:13:35:00.000 586610468.184 586618568.184 8100.0 0020 1320 "TKG PASS" N064 1,024,000 GOLDSTONE O DSS-15  
44c43
< 523707 2016:222:17:20:00.000 2016:222:19:35:00.000 587150468.184 587158568.184 8100.0 1820 1920 PRE-PIT N064  CANBERRA - DSS-36  

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> 523707 2016:222:17:20:00.000 2016:222:19:35:00.000 587150468.184 587158568.184 8100.0 1820 1920 PRE-PIT N064  Unknown - DSS-36  
47c46
< 522582 2016:223:13:00:00.000 2016:223:15:15:00.000 587221268.184 587229368.184 8100.0 1400 1500 PIT N064 1,024,000 CANBERRA O DSS-36 "Jay Wellington" "William Rios"

---
> 522582 2016:223:13:00:00.000 2016:223:15:15:00.000 587221268.184 587229368.184 8100.0 1400 1500 PIT N064 1,024,000 Unknown O DSS-36 "Jay Wellington" "William Rios"
diff -r test/major_events.ecsv flight/major_events.ecsv
11c11
< 2016:216 2016-Aug-03 586616257.184 "EIA Sequencer self-test" "CAP 425I" FDB

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> 2016:216 2016-Aug-03 586616256.184 "EIA Sequencer self-test" "CAP 425I" FDB