Bumping graylog dependency version to next development iteration.

Author: dennisoelkers

pom.xml

@@ -37,7 +37,7 @@
         <maven.install.skip>true</maven.install.skip>
         <maven.deploy.skip>true</maven.deploy.skip>
         <maven.site.skip>true</maven.site.skip>
-        <graylog2.version>2.1.0-alpha.1</graylog2.version>
+        <graylog2.version>2.1.0-alpha.2-SNAPSHOT</graylog2.version>
         <graylog2.plugin-dir>/usr/share/graylog-server/plugin</graylog2.plugin-dir>
         <antlr.version>4.5.1</antlr.version>
         <slf4j.version>1.7.13</slf4j.version>