Use latest commons alpha release

Mark Craig

11.15.2016 bdfa26cca79700ff0b5ea4d580004ff5352aa59b

 opendj-bom/pom.xml

@@ -45,7 +45,7 @@
            <dependency>
                <groupId>org.forgerock.commons</groupId>
                <artifactId>commons-bom</artifactId>
                <version>21.0.0-alpha-15</version>
                <version>21.0.0-alpha-17</version>
                <scope>import</scope>
                <type>pom</type>
            </dependency>