Mark spider tests big

Due to high memory reqirements spider tests fail often on automated testing
VM's due to rather limited resource allocation.

For example with 10.2 spider needs at least 200M * 8 mysqld instances = 1.6Gb
RAM per mtr instance. With --parallel=4 it needs 6.4Gb, while appropriate hosts
have just 3Gb.

storage/spider/mysql-test/spider/bg/suite.pm

@@ -4,6 +4,7 @@ package My::Suite::Spider;
 
 return "No Spider engine" unless $ENV{HA_SPIDER_SO};
 return "Not run for embedded server" if $::opt_embedded_server;
+return "Test needs --big-test" unless $::opt_big_test;
 
 bless { };
 

storage/spider/mysql-test/spider/suite.pm

@@ -4,6 +4,7 @@ package My::Suite::Spider;
 
 return "No Spider engine" unless $ENV{HA_SPIDER_SO};
 return "Not run for embedded server" if $::opt_embedded_server;
+return "Test needs --big-test" unless $::opt_big_test;
 
 sub is_default { 1 }