Fixes for Test Screenshot upload build step (#4792)

Fixes the test screenshot upload build step:

- Added missing positional parameters
- Double quoting the command statements to allow variable expansion (also fixes broken Python call)
- Escaping the double quotes within the command statement

Signed-off-by: Mike Chang <changml@amazon.com>

scripts/build/Jenkins/Jenkinsfile

@@ -416,16 +416,18 @@ def ExportTestResults(Map options, String platform, String type, String workspac
     }
 }
 
-def ExportTestScreenshots(Map options, String workspace, String platformName, String jobName, Map params) {
+def ExportTestScreenshots(Map options, String branchName, String platformName, String jobName, String workspace, Map params) {
     catchError(message: "Error exporting test screenshots (this won't fail the build)", buildResult: 'SUCCESS', stageResult: 'FAILURE') {
-        def screenshotsFolder = '${workspace}/${ENGINE_REPOSITORY_NAME}/AutomatedTesting/user/PythonTests/Automated/Screenshots'
-        def s3Uploader = '${workspace}/${ENGINE_REPOSITORY_NAME}/scripts/build/tools/upload_to_s3.py'
-        def command = '${options.PYTHON_DIR}/python.cmd -u ${s3Uploader} --base_dir ${screenshotsFolder} ' +
-                      '--file_regex "(.*zip$)" --bucket ${env.TEST_SCREENSHOT_BUCKET} ' +
-                      '--search_subdirectories True --key_prefix ${branchName}_${env.BUILD_NUMBER}' +
-                      '--extra-args {"ACL": "bucket-owner-full-control"}'
-        bat label: "Uploading test screenshots for ${jobName}",
-            script: command
+        dir("${workspace}/${ENGINE_REPOSITORY_NAME}") {
+            def screenshotsFolder = "AutomatedTesting/user/PythonTests/Automated/Screenshots"
+            def s3Uploader = "scripts/build/tools/upload_to_s3.py"
+            def command = "${options.PYTHON_DIR}/python.cmd -u ${s3Uploader} --base_dir ${screenshotsFolder} " +
+                          '--file_regex \\"(.*zip\$)\\" ' +
+                          "--bucket ${env.TEST_SCREENSHOT_BUCKET} " +
+                          "--search_subdirectories True --key_prefix ${branchName}_${env.BUILD_NUMBER} " +
+                          '--extra_args {\\"ACL\\":\\"bucket-owner-full-control\\"}'
+            palSh(command, "Uploading test screenshots for ${jobName}")
+        }
     }
 }
 
@@ -484,10 +486,10 @@ def CreateExportTestResultsStage(Map pipelineConfig, String platformName, String
     }
 }
 
-def CreateExportTestScreenshotsStage(Map pipelineConfig, String platformName, String jobName, Map environmentVars, Map params) {
+def CreateExportTestScreenshotsStage(Map pipelineConfig, String branchName, String platformName, String jobName, Map environmentVars, Map params) {
     return {
         stage("${jobName}_screenshots") {
-            ExportTestScreenshots(pipelineConfig, platformName, jobName, environmentVars['WORKSPACE'], params)
+            ExportTestScreenshots(pipelineConfig, branchName, platformName, jobName, environmentVars['WORKSPACE'], params)
         }
     }
 }
@@ -556,7 +558,7 @@ def CreateSingleNode(Map pipelineConfig, def platform, def build_job, Map envVar
                             CreateExportTestResultsStage(pipelineConfig, platform.key, build_job_name, envVars, params).call()
                         }
                         if (params && params.containsKey('TEST_SCREENSHOTS') && params.TEST_SCREENSHOTS == 'True' && currentResult == 'FAILURE') {
-                            CreateExportTestScreenshotsStage(pipelineConfig,  platform.key, build_job_name, envVars, params).call()
+                            CreateExportTestScreenshotsStage(pipelineConfig, branchName, platform.key, build_job_name, envVars, params).call()
                         }
                         CreateTeardownStage(envVars).call()
                     }