[LDAP] nested groups filter is not allowed

[kduret]

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BUG REPORT INFORMATION

Centreon Web version: 2.8.19

OS: CentOS 7

Steps to reproduce the issue:

1. Create nested groups in active directory
2. Add a user in the lower group
3. Configure LDAP to find user in the lower level of the top group :

• user filter : (&(samAccountName=%s)(objectClass=user)(samAccountType=805306368)(memberOf:1.2.840.113556.1.4.1941:=<top_group_dn>))
• user group attribute : memberOf:1.2.840.113556.1.4.1941:
• group member attribute : member:1.2.840.113556.1.4.1941:

Describe the results you received:
if a user if imported and I reload configuration, contactgroup relations are deleted

Describe the results you expected:
if a user if imported and I reload configuration, the user keeps its relations