fix(sec): remove xss injection of service output in host form

[kduret]

Description

Remove xss injection in host form when service's plugin output contains javascript

Fixes MON-4148

Type of change

• Patch fixing an issue (non-breaking change)
• New functionality (non-breaking change)
• Breaking change (patch or feature) that might cause side effects breaking part of the Software
• Updating documentation (missing information, typo...)

Target serie

• 2.8.x
• 18.10.x
• 19.04.x
• 19.10.x (master)

How this pull request can be tested ?

• monitor services
• run following query in centreon_storage table : update services set output="<script>alert('toto');</script>";
• go to monitoring host form
• check that alrt box is not displayed