Merge pull request #4190 from esl/migration-guide #1052

Job	Run time
dynamic domains pgsql_mnesia on OTP 26.1.2	18m 12s
dialyzer on OTP 25.2	4m 37s
edoc on OTP 25.2	2m 14s
dynamic domains mysql_redis on OTP 26.1.2	17m 30s
internal_mnesia on OTP 26.1.2	18m 57s
dynamic domains odbc_mssql_mnesia on OTP 26.1.2	19m 37s
pgsql_mnesia on OTP 26.1.2	20m 43s
mysql_redis on OTP 26.1.2	20m 20s
centos_7 package	5m 45s
odbc_mssql_mnesia on OTP 26.1.2	22m 29s
dynamic domains pgsql_mnesia on OTP 25.3.2.6	17m 55s
small_tests on OTP 25.3.2.6	7m 39s
ldap_mnesia on OTP 26.1.2	16m 46s
ubuntu_xenial package	5m 44s
elasticsearch_and_cassandra_mnesia on OTP 26.1.2	7m 25s
ldap_mnesia on OTP 25.3.2.6	17m 35s
small_tests on OTP 26.1.2	7m 48s
pgsql_mnesia on OTP 25.3.2.6	21m 7s
xref on OTP 25.2	2m 14s
coveralls_webhook	0s
	4h 14m 37s

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