Support Maven wrapper

[yahavi]

• All tests passed. If this feature is not already covered by the tests, I added new tests.
• This pull request is created in the jfrog/jenkins-artifactory-plugin repository.

---

Resolves #116

Add support for Maven wrapper.

Usage same as Gradle wrapper:

• Declarative pipeline:

  rtMavenRun(
          ...
          useWrapper: true,
          ...
  )

• Scripted pipeline:

  def rtMaven = Artifactory.newMavenBuild()
  rtMaven.useWrapper = true