Master mon 2467 v2 (#6117)

* Prepare 2.8.8 release.

* fix(Conflict): Header conflict

* * fix knowledge cron compatibility php < 5.4 and check api configuration

* Update documentation

* fix(instance): Export with filter

* fix(HTPL): Export with filters

* fix(HTPL): Export with filters(trap)

* fix(Engine): cfg export with filter

* fix(export): add dependency injector

* fix(brokercfg): export with filter

* Correct make html warning/error for EN documentation

* fix(login): Remove duplicate $_GET["autologin"] in test

* Allow to use "min" in url with autologin - #5338

* fix(style): Coding style

* fix(filters): Filters on HG and CG export

* Fix typos in Enabled/Disabled filters (#5251)

* fix(export): Wrong parameters for several exports

* fix(export): wrong parameter for export HG

* Clarify documentation of centreon clapi authentication

* 5611 improve centreon documentation (#5612)

* Add notice label to restart server after disabled selinux

* Move installation documentation chapters in correct order

* Fix french typo in install chapter

* fix(doc): Add Launch services

* Activate services at system startup

* fix(doc): Reset installing poller

* fix(useless): Remove useless construct

* Add release note for Centreon Web 2.8.15

* fix(RtDowntime): Missing instantiation of objects host and service

* Correct typo

* fix(PDO): Missing colon for PDO

* fix(listHost): Wrong parameter

* doc(release note) : Add empty release note for the 2.8.18

* Add missing paragraph in documentation of installation for Centreon ISO el7 FR

* fix(form): JQuery function forget

* Add release note for Centreon Web 2.8.18

* Add notice for ISO availability