PT-2102_pt-mysql-summary should support include in config files (#601)

* PT-2102 pt-mysql-summary should support include* in config file

includedir directories are now printed in the order of which they appear in root my.cnf

* PT-2102 pt-mysql-summary should support include* in config file

!include was not supported. Changed 'for' to 'while' to properly
test for '!includedir' and '!include'. Supports extra spaces between
files and !include.

* PT-2102 pt-mysql-summary should support include* in config file

Updates modules, added test case for !include and !includedir
Changed find_my_cnf function to make it try every regexes and only
returned when it find one

* Update pt-mysql-summary

Identation fix as suggested by review

* Update collect_mysql_info.sh

Identation as suggested by review

* PT-2102 pt-mysql-summary should support include* in config file

Fix formatting after review

---------

Co-authored-by: Sveta Smirnova <svetasmirnova@users.noreply.github.com>

t/pt-mysql-summary/samples/my.cnf-002.txt

@@ -0,0 +1,43 @@
+[mysqld]
+####datadir=/var/lib/mysql
+datadir=/mnt/data/mysql
+####socket=/var/lib/mysql/mysql.sock
+socket=/mnt/data/mysql/mysql.sock
+# Default to using old password format for compatibility with mysql 3.x
+# clients (those using the mysqlclient10 compatibility package).
+old_passwords=1
+
+ssl-key         = /opt/mysql.pdns/.cert/server-key.pem
+ssl-cert        = /opt/mysql.pdns/.cert/server-cert.pem
+ssl-ca          = /opt/mysql.pdns/.cert/ca-cert.pem
+
+innodb_buffer_pool_size = 16M
+innodb_flush_method = O_DIRECT
+## THIS SETTING REQUIRE SPECIAL SHUTDOWN PROCEDURE AND MOVING LOGFILE. DO NOT SET UNLESS YOU UNDERSTAND WHAT YOU ARE DOING!
+innodb_log_file_size = 64M
+innodb_log_buffer_size = 1M
+innodb_flush_log_at_trx_commit = 2
+innodb_file_per_table = 1
+
+ssl = 1
+
+server-id = 1
+log-bin=sl1-bin
+
+wsrep_provider_options = "gcache.size=64M;base_host=10.1.2.102; base_port=4567; cert.log_conflicts=no;etc=etc;"
+
+[mysql.server]
+user=mysql
+####basedir=/var/lib
+basedir=/mnt/data
+
+[mysqld_safe]
+log-error=/var/log/mysqld.log
+pid-file=/var/run/mysqld/mysqld.pid
+
+[mysql]
+
+
+[xtrabackup]
+target-dir=/data/backup
+