Release 4: Additional attributes and bug fixes

What's Changed

• BUILD-3027 fix bugs buildBlockerProperty and leastLoadDisabled by @NatWoodson in #41
• BUILD-3027-convert branch name correctly and correct parameterDefinitionsProperty by @NatWoodson in #42
• BUILD-3033-ansiColorBuildWrapper property by @NatWoodson in #43
• BUILD-3044 testing plugin to access and convert promotions by @NatWoodson in #45
• Build-3045-do not render methods with empty values by @NatWoodson in #46
• [BUILD-2880] render promotions in order by @NatWoodson in #33
• BUILD-3088 correct url for repository url by @NatWoodson in #48
• git extension properties causing job errors by @NatWoodson in #49
• preBuildCleanup property by @NatWoodson in #47
• [BUILD-3087] Parameters should not be nested under properties by @pamgluss-slack in #51
• BUILD-3115-add support for usernamePassword credentialsId and authenticationToken by @NatWoodson in #53
• [BUILD-3100] throttleJob should not display if it is disabled by @pamgluss-slack in #52
• handle postBuildStep -> shell by @NatWoodson in #54
• [BUILD-3101] Correct BuildTrigger translation by @pamgluss-slack in #55
• copyArtifacts and associated properties by @NatWoodson in #50
• [BUILD-3116] Results should be an array by @pamgluss-slack in #57
• correct failing junitResultArchiver by @NatWoodson in #56
• BUILD-3103 add required properties with default values for EnvInjectBuildWrapper by @NatWoodson in #58

Full Changelog: xml_to_dsl_v.3.0...xml_to_dsl_v.4.0