updates to OrientDB 2.2.21

Author: robfrank

pom.xml

@@ -117,7 +117,7 @@
         <!-- dependency versions -->
         <slf4j.version>1.7.22</slf4j.version>
         <logback.version>1.1.9</logback.version>
-        <orientdb.version>2.2.20</orientdb.version>
+        <orientdb.version>2.2.21</orientdb.version>
         <aspectj.version>1.8.9</aspectj.version>
         <spring.version>4.3.8.RELEASE</spring.version>
         <spring.data.version>1.13.3.RELEASE</spring.data.version>