[paperless] Limit tika heap size

ansible/roles/paperless/files/immortal-tika.yml

@@ -1,4 +1,4 @@
-cmd: java -jar tika-server-standard-2.3.0.jar --host=0.0.0.0 --port=9998
+cmd: java -Xms1G -Xmx2G -jar tika-server-standard-2.3.0.jar --host=0.0.0.0 --port=9998
 cwd: /usr/local/bin/
 log:
     file: /var/log/tika.log