1. Proposed title of this feature request

 --> Enhance Maven Task to support optional ENV_VARS parameter in a similar way as it is  done in s2i-java task.

2. What is the nature and description of the request?

--> The request is to implement a new optional parameter named ENV_VARS for the Maven build Task. This parameter should accept an array of strings formatted as KEY=VALUE pairs. 
params:

• name: ENV_VARS
  value:
• MAVEN_LOCAL_REPO=/tmp/src/m2_cache
• MAVEN_MIRROR_URL=<mirror-url>
• MAVEN_MIRROR_OF=central

3. Why does the customer need this? (List the business requirements here

--> It is needed to set extra environment variables for maven, they are using these ones for example, but any other MAVEN environment variable could be useful:
ENV_VARS:

• MAVEN_MIRROR_OF=central
• MAVEN_LOCAL_REPO=/tmp/src/m2_cache
• MAVEN_CLEAR_REPO=true

4. List any affected packages or components.

--> It shouldn't affect anything at all if ENV_VARS parameter is made optional.