two suggestion to RedisGraphAPITest

[yongdi]

1. writing error

81 line:

ResultSet resultSet = api.query("social", "MATCH (a:Person), (b:Person) WHERE (a.name = 'roi' AND b.name='amit')  CREATE (a)-[:Knows]->(a)"); // guess you want to say a-knows-b

2. log4j missing
   run test will complain no slf4 default implementation.
   I add a dependency to fix it:
   <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-simple</artifactId> <version>1.6.6</version> </dependency>