Test if Zoo-prop-editor can set classpath context without the manager running

[ddanielr]

Describe the bug
Encountered an issue where zoo-prop-editor was unable to set a classpath context value due to not being able to validate the context.
Was able to finally set the value once the manager was up and running.
Need to test the code and see if this was a coincidence as zoo-prop-editor should function when the entire accumulo-cluster is down.

Versions (OS, Maven, Java, and others, as appropriate):

• Affected version(s) of this project: [e.g. 1.10.0] 2.1.x

Expected behavior
zoo-prop-editor should be able to set any property value as it is defined as a repair tool to use when accumulo cannot start when an invalid configuration value is present in zookeeper.

[ddanielr]

A solution to this may be adding a --force or --skip-validation flag to zoo-prop-editor to allow any property value to be set.

Unsure if it should skip propertyType validation as well. Need to see what validation is performed for classpath contexts.