[ldapfeed] re-enable ldap tests for python 3.7 This was disabled because ldap3<2 wasn't compatible with python 3.7 While I'm here, drop unseless newline.

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etc/init.d

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etc/cubicweb.d

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usr/bin

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var/log/cubicweb

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var/lib/cubicweb/backup

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var/lib/cubicweb/instances