Fix Rubocop offenses in LDAP related code and spec

lib/gitlab/ldap/access.rb

@@ -69,7 +69,7 @@ module Gitlab
         user.ldap_block
         Gitlab::AppLogger.info(
-          "LDAP account \"#{user.ldap_identity.extern_uid}\" #{reason}, " +
+          "LDAP account \"#{user.ldap_identity.extern_uid}\" #{reason}, " \
           "blocking Gitlab user \"#{user.name}\" (#{user.email})"
         )
       end
@@ -78,7 +78,7 @@ module Gitlab
         user.activate
         Gitlab::AppLogger.info(
-          "LDAP account \"#{user.ldap_identity.extern_uid}\" #{reason}, " +
+          "LDAP account \"#{user.ldap_identity.extern_uid}\" #{reason}, " \
           "unblocking Gitlab user \"#{user.name}\" (#{user.email})"
         )
       end

spec/lib/gitlab/ldap/access_spec.rb

@@ -127,7 +127,7 @@ describe Gitlab::LDAP::Access, lib: true do
     it 'logs the reason' do
       expect(Gitlab::AppLogger).to have_received(:info).with(
-        "LDAP account \"123456\" reason, " +
+        "LDAP account \"123456\" reason, " \
         "blocking Gitlab user \"#{user.name}\" (#{user.email})"
       )
     end
@@ -148,7 +148,7 @@ describe Gitlab::LDAP::Access, lib: true do
     it 'logs the reason' do
       Gitlab::AppLogger.info(
-        "LDAP account \"123456\" reason, " +
+        "LDAP account \"123456\" reason, " \
         "unblocking Gitlab user \"#{user.name}\" (#{user.email})"
       )
     end