Launcher Script JAVA_OPTS bug in Spring Boot "fully executable" JARs

Demonstrates bug in which JAVA_OPTS options treated as a single option by the "fully executable jar" default launcher script.

Steps to reproduce

1. Clone this repo
2. Run ./gradlew clean demoZip
3. Follow the steps printed at the end of the build.
   1. Copy build/distributions/launcher-java-opts-bug-1.0.zip to a Linux machine with > Java 7
      1. Linux user must have sudo priveleges
   2. In any folder, 'unzip launcher-java-opts-bug-1.0.zip'
   3. Run launcher-java-opts-bug-demo.sh
      1. If necessary, provide sudoer password
   4. Read and follow manual steps listed in the script's output
      1. Open launcher-java-opts-bug.log in this same directory
      2. Look for an error like: Invalid maximum heap size: -Xmx100M -Dspring.profiles.active=myProfile