bash - Evaluate each environment variable and set it back in ubuntu

I'm trying to write a shell script which reads all the environment variables, evaluate them for included env. variable with in them and re-export after evaluvation.

Example - I've an environment variable exposed like this:

echo $JVM_OPTS
-Djava.awt.headless=true -Xmx1600m  -Djava.rmi.server.hostname=${CONTAINER_IP} -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Duser.language=en -Duser.country=US -XX:+HeapDumpOnOutOfMemoryError -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:+CMSIncrementalPacing -XX:CMSIncrementalDutyCycleMin=0
echo $CONTAINER_IP
10.44.214.63

Now, I need to eval "JVM_OPTS" variable and substitute the value of ${CONTAINER_IP} in $JVM_OPTS to 10.44.214.63. Finally, set this evaluated value back in JVM_OPTS variable.

Sample Output:

echo $JVM_OPTS
    -Djava.awt.headless=true -Xmx1600m  -Djava.rmi.server.hostname=10.44.214.63 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Duser.language=en -Duser.country=US -XX:+HeapDumpOnOutOfMemoryError -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:+CMSIncrementalPacing -XX:CMSIncrementalDutyCycleMin=0

My Analysis so far:
I wrote the below code to do the task

#!/bin/bash
for path in $(printenv); do
    path=`eval echo $path`
    echo $path
done

printenv would give the entire env. variable along with values. I just need the name and then use the value.

How to achieve this?

Answer

The following worked for me.

for path in $(compgen -e) ; do
    eval "$path=\"${!path//\"/\\\"}\""
done

As posted at https://stackoverflow.com/a/36449824/1925997