Checkstyle can't be run from submodules

[artur-ciocanu]

Expected Behavior

We should be able to run any code check from Java SDK submodules

Actual Behavior

Currently when going to sub-folder and trying to run for example: ../mvnw validate we will get an error like:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-checkstyle-plugin:3.4.0:check (validate) on project dapr-sdk-actors: Failed during checkstyle configuration: cannot initialize module RegexpHeader - illegal value '.java_header' for property 'headerFile': com.puppycrawl.tools.checkstyle.api.CheckstyleException: Unable to find: .java_header -> [Help 1]

This is not very developer friendly

Steps to Reproduce the Problem

Follow these steps:

1. Go to Java SDK main folder
2. Execute cd sdk-actors
3. Run ../mvnw validate

Release Note

RELEASE NOTE: