attempt to fix sed command for travis setup

Author: ikwattro

build/install-neo.sh

@@ -6,5 +6,5 @@ export JRE_HOME=/usr/lib/jvm/java-8-oracle
 wget http://dist.neo4j.org/neo4j-enterprise-3.3.0-unix.tar.gz > null
 mkdir neo
 tar xzf neo4j-enterprise-3.3.0-unix.tar.gz -C neo --strip-components=1 > null
-sed -i.bak '/\(dbms\.security\.auth_enabled=\).*/s/^#//g' ./neo/conf/neo4j.conf
+sed -i.bak '0,/\(dbms\.security\.auth_enabled=\).*/s/^#//g' ./neo/conf/neo4j.conf
 neo/bin/neo4j start > null &