Rename method to create new organisation directory

Assign a proper name to the method responsible to create the new
empty directory for the GitHub organisation, ready to host the clone
of the GitHub Git repositories to import

Change-Id: I3347d15c71d1712d21b1ebf12076e6c08e5820a6

github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/git/GitCloneStep.java

diff --git a/github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/git/GitCloneStep.java b/github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/git/GitCloneStep.java
index 44fc1a1..2a56590 100644
--- a/github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/git/GitCloneStep.java
+++ b/github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/git/GitCloneStep.java
@@ -45,10 +45,10 @@
     super(gitConfig.gitHubUrl, organisation, repository, gitHubRepoFactory);
     LOG.debug("GitHub Clone " + organisation + "/" + repository);
     this.gitDir = gitConfig.gitDir.toFile();
-    this.destinationDirectory = getDestinationDirectory(organisation, repository);
+    this.destinationDirectory = prepareTargetGitDirectory(organisation, repository);
   }
 
-  private File getDestinationDirectory(String organisation, String repository)
+  private File prepareTargetGitDirectory(String organisation, String repository)
       throws GitDestinationAlreadyExistsException, GitDestinationNotWritableException {
     File orgDirectory = new File(gitDir, organisation);
     File destDirectory = new File(orgDirectory, repository + ".git");
@@ -90,10 +90,6 @@
     return destDirectory.listFiles().length > 0;
   }
 
-  public File getDestinationDirectory() {
-    return destinationDirectory;
-  }
-
   @Override
   public boolean rollback() {
     File gitDirectory = destinationDirectory;