OAK-2128: Scalability benchmarks for search

Fixed checks and usage of optional parameters
Added message to select available suites

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1632582 13f79535-47bb-0310-9956-ffa450edef68
OAK-1941 - refactoring

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1632591 13f79535-47bb-0310-9956-ffa450edef68
OAK-2211 - Use Lucene index on non root node

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1632592 13f79535-47bb-0310-9956-ffa450edef68