Updated code example for LDAP integration#7917

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pmlt wants to merge 5 commits intosymfony:3.2from

pmlt:update_ldap_code_example

Commits on May 18, 2017

Commits on May 22, 2017

Convert accidental tabs to spaces
pmlt
committed

Commits on May 26, 2017

Fix class name in LDAP PHP code example
pmlt
committed