Change MiniTest namespace to latest

MiniTest namespace which runs test cases changed to Minitest name.
As we are using older version test cases where failing to execute.
Fixed the namespaces and refactored some code.

lib/rim/command_helper.rb

@@ -35,7 +35,7 @@ def check_arguments
   def create_module_info(remote_url, local_path, target_revision, ignores, subdir)
     ModuleInfo.new(
         remote_url,
-        get_relative_path(local_path),
+        FileHelper.get_relative_path(local_path),
         target_revision,
         ignores,
         remote_url ? get_remote_branch_format(remote_url) : nil,

lib/rim/git.rb

@@ -33,7 +33,7 @@ def self.logger=(logger)
 
   def self.open(execute_dir, options = {})
     log = @logger || Logger.new($stdout)
-    self.new(log, execute_dir, options)
+    new(log, execute_dir, options)
   end
 
   def self.next_invocation_id

lib/rim/processor.rb

@@ -50,10 +50,6 @@ def remote_path(remote_url)
     gsub(/\.\.[\\\/]/,'')
 end
 
-def get_relative_path(path)
-  FileHelper.get_relative_path(path, @ws_root)
-end
-
 def get_absolute_remote_url(remote_url)
   if remote_url.start_with?("file:")
     remote_url = remote_url.gsub(/^file:(\/\/)?/, "")

test/dirty_check_test.rb

@@ -7,7 +7,7 @@
 require 'rim/rim_info'
 require 'rim/dirty_check'
 
-class DirtyCheckTest < MiniTest::Test
+class DirtyCheckTest < Minitest::Test
 
 include FileUtils
 include TestHelper

test/git_test.rb

@@ -6,7 +6,7 @@
 require 'test_helper'
 require 'rim/git'
 
-class GitTest < MiniTest::Test
+class GitTest < Minitest::Test
 
 include FileUtils
 include TestHelper

test/rim_info_test.rb

@@ -6,7 +6,7 @@
 require 'test_helper'
 require 'rim/rim_info'
 
-class RimInfoTest < MiniTest::Test
+class RimInfoTest < Minitest::Test
 
 include FileUtils
 include TestHelper

test/status_builder_test.rb

@@ -8,7 +8,7 @@
 require 'rim/dirty_check'
 require 'rim/status_builder'
 
-class StatusBuilderTest < MiniTest::Test
+class StatusBuilderTest < Minitest::Test
 
 include FileUtils
 include TestHelper