Fixing flaky test remove_dead_from_cluster_http

[JanuszJakubiec]

Fixing flaky test remove_dead_from_cluster_http.
Removing join_unsuccessful_http test, because it was not testing anything(just receiving ok from GraphQL), and caused problems wit remove_dead_from_cluster_http.

[mongoose-im]

small_tests_24 / small_tests / 8332528
Reports root / small

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small_tests_25 / small_tests / 8332528
Reports root / small

---

ldap_mnesia_24 / ldap_mnesia / 8332528
Reports root/ big
OK: 2218 / Failed: 0 / User-skipped: 825 / Auto-skipped: 0

---

dynamic_domains_pgsql_mnesia_24 / pgsql_mnesia / 8332528
Reports root/ big
OK: 4168 / Failed: 0 / User-skipped: 88 / Auto-skipped: 0

---

ldap_mnesia_25 / ldap_mnesia / 8332528
Reports root/ big
OK: 2218 / Failed: 0 / User-skipped: 825 / Auto-skipped: 0

---

dynamic_domains_mysql_redis_25 / mysql_redis / 8332528
Reports root/ big
OK: 4142 / Failed: 0 / User-skipped: 114 / Auto-skipped: 0

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dynamic_domains_pgsql_mnesia_25 / pgsql_mnesia / 8332528
Reports root/ big
OK: 4168 / Failed: 0 / User-skipped: 88 / Auto-skipped: 0

---

dynamic_domains_mssql_mnesia_25 / odbc_mssql_mnesia / 8332528
Reports root/ big
OK: 4165 / Failed: 0 / User-skipped: 91 / Auto-skipped: 0

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pgsql_mnesia_24 / pgsql_mnesia / 8332528
Reports root/ big
OK: 4548 / Failed: 0 / User-skipped: 97 / Auto-skipped: 0

---

internal_mnesia_25 / internal_mnesia / 8332528
Reports root/ big
OK: 2360 / Failed: 0 / User-skipped: 683 / Auto-skipped: 0

---

elasticsearch_and_cassandra_25 / elasticsearch_and_cassandra_mnesia / 8332528
Reports root/ big
OK: 2720 / Failed: 0 / User-skipped: 662 / Auto-skipped: 0

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pgsql_mnesia_25 / pgsql_mnesia / 8332528
Reports root/ big
OK: 4548 / Failed: 0 / User-skipped: 97 / Auto-skipped: 0

---

riak_mnesia_24 / riak_mnesia / 8332528
Reports root/ big
OK: 2558 / Failed: 0 / User-skipped: 654 / Auto-skipped: 0

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mssql_mnesia_25 / odbc_mssql_mnesia / 8332528
Reports root/ big
OK: 4545 / Failed: 0 / User-skipped: 100 / Auto-skipped: 0

---

mysql_redis_25 / mysql_redis / 8332528
Reports root/ big
OK: 4534 / Failed: 0 / User-skipped: 111 / Auto-skipped: 0

[codecov]

Codecov Report

Base: 83.54% // Head: 83.54% // Increases project coverage by +0.00% 🎉

Coverage data is based on head (8332528) compared to base (25757b1).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3968   +/-   ##
=======================================
  Coverage   83.54%   83.54%           
=======================================
  Files         538      538           
  Lines       34003    34003           
=======================================
+ Hits        28408    28409    +1     
+ Misses       5595     5594    -1     

Impacted Files	Coverage Δ
src/pubsub/mod_pubsub_db.erl	57.14% <0.00%> (-28.58%)	⬇️
src/domain/service_domain_db.erl	83.33% <0.00%> (-2.09%)	⬇️
src/pubsub/mod_pubsub_db_mnesia.erl	92.40% <0.00%> (-1.27%)	⬇️
src/ejabberd_s2s_out.erl	62.53% <0.00%> (-0.75%)	⬇️
src/rdbms/mongoose_rdbms.erl	66.31% <0.00%> (-0.71%)	⬇️
src/mod_muc_log.erl	62.82% <0.00%> (ø)
src/pubsub/mod_pubsub.erl	73.48% <0.00%> (ø)
src/inbox/mod_inbox_rdbms_async.erl	72.05% <0.00%> (ø)
src/pubsub/mod_pubsub_db_rdbms.erl	95.34% <0.00%> (+0.25%)	⬆️
src/domain/mongoose_domain_loader.erl	90.17% <0.00%> (+0.89%)	⬆️
... and 2 more

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[chrzaszcz]

Looks good