Migrate Platform.getJobManager() to Job.getJobManager() to be Eclipse 4.17+ compliant.

Change-Id: I34fa90d4e51399a038cd92f14839f3a8c4bbe189
diff --git a/plugins/org.eclipse.tigerstripe.workbench.ui.base/src/java/org/eclipse/tigerstripe/workbench/ui/internal/export/ModuleExportWizard.java b/plugins/org.eclipse.tigerstripe.workbench.ui.base/src/java/org/eclipse/tigerstripe/workbench/ui/internal/export/ModuleExportWizard.java
index 4c8ae17..7e3143d 100644
--- a/plugins/org.eclipse.tigerstripe.workbench.ui.base/src/java/org/eclipse/tigerstripe/workbench/ui/internal/export/ModuleExportWizard.java
+++ b/plugins/org.eclipse.tigerstripe.workbench.ui.base/src/java/org/eclipse/tigerstripe/workbench/ui/internal/export/ModuleExportWizard.java
@@ -123,7 +123,7 @@
 			};
 			try {
 				ISchedulingRule rule = null;
-				Job job = Platform.getJobManager().currentJob();
+				Job job = Job.getJobManager().currentJob();
 				if (job != null)
 					rule = job.getRule();
 				IRunnableWithProgress runnable = null;
diff --git a/plugins/org.eclipse.tigerstripe.workbench.ui.base/src/java/org/eclipse/tigerstripe/workbench/ui/internal/wizards/NewTSElementWizard.java b/plugins/org.eclipse.tigerstripe.workbench.ui.base/src/java/org/eclipse/tigerstripe/workbench/ui/internal/wizards/NewTSElementWizard.java
index df50f12..261de2f 100644
--- a/plugins/org.eclipse.tigerstripe.workbench.ui.base/src/java/org/eclipse/tigerstripe/workbench/ui/internal/wizards/NewTSElementWizard.java
+++ b/plugins/org.eclipse.tigerstripe.workbench.ui.base/src/java/org/eclipse/tigerstripe/workbench/ui/internal/wizards/NewTSElementWizard.java
@@ -159,7 +159,7 @@
 		};
 		try {
 			ISchedulingRule rule = null;
-			Job job = Platform.getJobManager().currentJob();
+			Job job = Job.getJobManager().currentJob();
 			if (job != null)
 				rule = job.getRule();
 			IRunnableWithProgress runnable = null;