Set fragile option to flaky tests

Added "fragile" option to the flaky tests that are
not intended to be run in parallel with others.
Option set at the suite.ini file at the appropriate
suites with comments including the issue that stores
the fail.

test/app/suite.ini

@@ -7,3 +7,4 @@ use_unix_sockets = True
 use_unix_sockets_iproto = True
 is_parallel = True
 pretest_clean = True
+fragile = socket.test.lua ; gh-4426 gh-4451

test/box-tap/suite.ini

@@ -3,3 +3,5 @@ core = app
 description = Database tests with #! using TAP
 is_parallel = True
 pretest_clean = True
+fragile = cfg.test.lua     ; gh-4344
+          key_def.test.lua ; gh-4252

test/box/suite.ini

@@ -9,3 +9,7 @@ use_unix_sockets = True
 use_unix_sockets_iproto = True
 is_parallel = True
 pretest_clean = True
+fragile = bitset.test.lua      ; gh-4095
+          func_reload.test.lua ; gh-4425
+          function1.test.lua   ; gh-4199
+          net.box.test.lua     ; gh-3851 gh-4383

test/engine/suite.ini

@@ -10,3 +10,5 @@ config = engine.cfg
 lua_libs = conflict.lua ../box/lua/utils.lua ../box/lua/push.lua
 is_parallel = True
 pretest_clean = True
+fragile = ddl.test.lua         ; gh-4353
+          recover_wal.test.lua ; gh-3767

test/replication/suite.ini

@@ -11,3 +11,10 @@ use_unix_sockets_iproto = True
 long_run = prune.test.lua
 is_parallel = True
 pretest_clean = True
+fragile = errinj.test.lua            ; gh-3870
+          join_vclock.test.lua       ; gh-4160
+          long_row_timeout.test.lua  ; gh-4351
+          skip_conflict_row.test.lua ; gh-4457
+          sync.test.lua              ; gh-3835 gh-3877
+          transaction.test.lua       ; gh-4312
+          wal_off.test.lua           ; gh-4355

test/sql-tap/suite.ini

@@ -29,3 +29,6 @@ long_run = gh-3332-tuple-format-leak.test.lua, gh-3083-ephemeral-unref-tuples.te
 config = engine.cfg
 show_reproduce_content = False
 pretest_clean = True
+fragile = gh-3083-ephemeral-unref-tuples.test.lua ; gh-4128
+          gh-4077-iproto-execute-no-bind.test.lua ; gh-4459
+          selectG.test.lua                        ; gh-4458

test/sql/suite.ini

@@ -10,3 +10,5 @@ lua_libs = lua/sql_tokenizer.lua
 release_disabled = errinj.test.lua view_delayed_wal.test.lua sql-debug.test.lua
 disabled = sql-statN-index-drop.test.lua
 pretest_clean = True
+fragile = dll.test.lua           ; gh-4427
+          func-recreate.test.lua ; gh-4384

test/vinyl/suite.ini

@@ -12,3 +12,6 @@ is_parallel = True
 # throttle.test.lua temporary disabled for gh-4168
 disabled = upgrade.test.lua throttle.test.lua
 pretest_clean = True
+fragile = errinj.test.lua             ; gh-4346
+          select_consistency.test.lua ; gh-4385
+          throttle.test.lua           ; gh-4168

test/wal_off/suite.ini

@@ -7,3 +7,4 @@ use_unix_sockets_iproto = True
 is_parallel = True
 pretest_clean = True
 disabled = iterator_lt_gt.test.lua
+fragile = iterator_lt_gt.test.lua ; gh-3925