Minor tweaks to release script

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=97687059

util/mvn-deploy.sh

@@ -5,16 +5,13 @@ key_count="$(echo ${keys} | wc -w)"
 seen=""
 while [[ $# > 0 ]] ; do
   param="$1"
-  case $param in
-    --signing-key)
-      # disambiguating or overriding key
-      key="$2"
-      shift
-    ;;
-    *)
-      seen="${seen} ${param}"
-    ;;
-  esac
+  if [[ $param == "--signing-key" ]]; then
+    # disambiguating or overriding key
+    key="$2"
+    shift
+  else
+    seen="${seen} ${param}"
+  fi
   shift
 done
 params=${seen}
@@ -53,5 +50,4 @@ elif [ ${key_count} -gt 1 ]; then
   exit 1;
 fi
 
-mvn ${params} clean site:jar -P sonatype-oss-release -Dgpg.keyname=${key} deploy
-
+mvn ${params} clean site:jar -P sonatype-oss-release ${key_param} deploy