Add an update script that helps to update the dispatcher configuratio…

[froesef]

…n using a dispatcher SDK

This PR adds a script that helps users to update their dispatcher configuration files. It calls the update_maven.sh script of the given dispatcher SDK and updates the immutable files as well as the pom.xml checksums to the new values.

This will help customers when updating to new dispatcher versions and will make sure they see what configurations have been updated.

Related Issue

Motivation and Context

How Has This Been Tested?

By first creating a new project:

mvn -B org.apache.maven.plugins:maven-archetype-plugin:3.2.1:generate \
 -D archetypeGroupId=com.adobe.aem \
 -D archetypeArtifactId=aem-project-archetype \
 -D archetypeVersion=37-SNAPSHOT\
 -D appTitle="My Site" \
 -D appId="mysite" \
 -D groupId="com.mysite" \
 -D archetypeCatalog=local

And afterwards updating it's dispatcher configuration by running:

./update_sdk.sh /opt/dispatcher-sdks/dispatcher-sdk-2.0.113

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.