[#OPENDJ-6682] Divergences in replication after upgrade from 2.6.4: entry missing in the changelog

Found with rev (d7c1991a9f8).

To check the upgrade task that does the ecl configuration migration, we have added a test that does the following:

it sets up 2 replicated servers, with 2.6.4 version, configured to replicate on dc=com.
it configures a new backend on each of these servers and replicate the new suffix dc=othersuffix, including some specific attributes for the changelog and check this works as expected by adding a user:

DJ_TASKS2/opendj/bin/dsconfig -h mytest.upgrade.com -p 4454 -D "cn=Directory Manager" -w password -X set-external-changelog-domain-prop --provider-name "Multimaster Synchronization" --domain-name dc=othersuffix --set ecl-include:sn --set enabled:true -n

DJ_TASKS2/opendj/bin/ldapmodify -h mytest.upgrade.com -p 1399 -D "cn=Directory Manager" -w password 	
dn: uid=user_ecl,dc=othersuffix
changetype: add
objectclass: top
objectclass: person
objectclass: inetorgperson
street: Test Lane
uid: user_ecl
cn: toto
sn: Second Suffix 	

Processing ADD request for uid=user_ecl,dc=othersuffix
ADD operation successful for DN uid=user_ecl,dc=othersuffix

DJ_TASKS2/opendj/bin/ldapsearch -h mytest.upgrade.com -p 1399 -D "cn=Directory Manager" -w password -T -b "changeNumber=2,cn=changelog"  "(&)" includedAttributes 	

dn: changeNumber=2,cn=changelog
includedAttributes:: c246IFNlY29uZCBTdWZmaXgK

Then both servers are stopped and upgraded one after the other, successfully.
We check the property has migrated:

DJ_TASKS2/opendj/bin/dsconfig -h mytest.upgrade.com -p 4454 -D "cn=Directory Manager" -w password -X get-replication-domain-prop --provider-name "Multimaster Synchronization" --domain-name dc=othersuffix --property ecl-include --script-friendly -n 	

ecl-include	sn

and add an entry on this suffix and check the changelog:

DJ_TASKS2/opendj/bin/ldapmodify -h mytest.upgrade.com -p 1399 -D "cn=Directory Manager" -w password 	
dn: uid=user_ecl2,dc=othersuffix
changetype: add
objectclass: top
objectclass: person
objectclass: inetorgperson
street: Test Lane
uid: user_ecl2
cn: titi
sn: Second Suffix2 	

# ADD operation successful for DN uid=user_ecl2,dc=othersuffix

DJ_TASKS2/opendj/bin/ldapsearch -h mytest.upgrade.com -p 1399 -D "cn=Directory Manager" -w password -b "changeNumber=2,cn=changelog"  "(&)" includedAttributes 	

# The LDAP search request failed: 32 (No Such Entry)
# Additional Information:  The entry changeNumber=2,cn=changelog specified as the search base does not exist in the Directory Server

Even if we wait for a bit, nothing for dc=othersuffix appears in the changelog:

DJ_TASKS2/opendj/bin/ldapsearch -h mytest.upgrade.com -p 1399 -D "cn=Directory Manager" -w password -b "cn=changelog"  objectclass=*
dn: cn=changelog
objectclass: top
objectclass: container
cn: changelog

dn: changeNumber=1,cn=changelog
objectclass: top
objectclass: changeLogEntry
changeNumber: 1
changes:: b2JqZWN0Q2xhc3M6IHRvcApvYmplY3RDbGFzczogaW5ldG9yZ3BlcnNvbgpvYmplY3RDbGFzczogb3JnYW5pemF0aW9uYWxQZXJzb24Kb2JqZWN0Q2xhc3M6IHBlcnNvbgpzbjogNQpjbjogSm9obnkgNQpnaXZlbk5hbWU6IEpvaG55CnVpZDogam9obnk1CmNyZWF0ZVRpbWVzdGFtcDogMjAxOTA5MjcwOTUzMjlaCmNyZWF0b3JzTmFtZTogY249RGlyZWN0b3J5IE1hbmFnZXIsY249Um9vdCBETnMsY249Y29uZmlnCmVudHJ5VVVJRDogMzgxOWI4MDctNmUyMy00OTBmLWEwNTQtNWYwODYyNGIzOTIxCg==
changeTime: 20190927095329Z
changeType: add
targetDN: uid=johny5,o=subtreedelete,ou=People,dc=com

To reproduce the issue:
in config.cfg:

[OpenDJ]
version = 7.0.0-SNAPSHOT
previous_version = 2.6.4
...

Then:

./run-pybot.py -nvs upgrade_group.UpgradeTasksPart1 opendj

[OPENDJ-6682] Divergences in replication after upgrade from 2.6.4: entry missing in the changelog Created: 27/Sep/19 Updated: 11/Dec/19 Resolved: 11/Dec/19
Status:	Done
Project:	OpenDJ
Component/s:	replication, upgrade
Affects Version/s:	7.0.0
Fix Version/s:	7.0.0

[OPENDJ-6682] Divergences in replication after upgrade from 2.6.4: entry missing in the changelog Created: 27/Sep/19 Updated: 11/Dec/19 Resolved: 11/Dec/19