update groupId to gov.nsa.emissary (#672)

Author: jpdahlke

pom.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
-  <groupId>gov.nsa</groupId>
+  <groupId>gov.nsa.emissary</groupId>
   <artifactId>emissary</artifactId>
   <version>8.0.0-SNAPSHOT</version>
   <packaging>jar</packaging>