Bumps repoze.lru version in requirements

install/requirements.txt

 python-dateutil==2.5.3
 python-editor==1.0.1
 python-ldap-test==0.2.1
-repoze.lru==0.6
+repoze.lru==0.7
 repoze.who==2.3
 requests==2.10.0
 six==1.8.0