Don't let ubuntu try to install its crazy jayatana agent.

By default, our security stuff will reject this (as do other apps).
See https://bugs.launchpad.net/ubuntu/+source/jayatana/+bug/1441487

However its not really the user's fault, ubuntu screws up here by
installing this agent by default. We don't want any agents.

So instead, we drop it like this:

```
$ bin/elasticsearch
Warning: Ignoring JAVA_TOOL_OPTIONS=-Bogus1 -Bogus2
Please pass JVM parameters via JAVA_OPTS instead
[2015-09-25 23:34:39,777][INFO ][node                     ] [Doctor Bong] version[3.0.0-SNAPSHOT], pid[19044], build[2f5b6ea/2015-09-26T03:18:16Z]
...
```

Closes #13785

distribution/src/main/resources/bin/elasticsearch

@@ -113,6 +113,14 @@ if [ -z "$ES_CLASSPATH" ]; then
     exit 1
 fi
 
+# don't let JAVA_TOOL_OPTIONS slip in (e.g. crazy agents in ubuntu)
+# works around https://bugs.launchpad.net/ubuntu/+source/jayatana/+bug/1441487
+if [ "x$JAVA_TOOL_OPTIONS" != "x" ]; then
+    echo "Warning: Ignoring JAVA_TOOL_OPTIONS=$JAVA_TOOL_OPTIONS"
+    echo "Please pass JVM parameters via JAVA_OPTS instead"
+    unset JAVA_TOOL_OPTIONS
+fi
+
 # Special-case path variables.
 case `uname` in
     CYGWIN*)

distribution/src/main/resources/bin/plugin

@@ -59,6 +59,13 @@ if [ -n "$ES_ENV_FILE" ]; then
   fi
 fi
 
+# don't let JAVA_TOOL_OPTIONS slip in (e.g. crazy agents in ubuntu)
+# works around https://bugs.launchpad.net/ubuntu/+source/jayatana/+bug/1441487
+if [ "x$JAVA_TOOL_OPTIONS" != "x" ]; then
+    echo "Warning: Ignoring JAVA_TOOL_OPTIONS=$JAVA_TOOL_OPTIONS"
+    unset JAVA_TOOL_OPTIONS
+fi
+
 if [ -x "$JAVA_HOME/bin/java" ]; then
     JAVA=$JAVA_HOME/bin/java
 else