add start time in millis and initialize it when setting startTime

I do not use starTime itself, since I would need to convert it
and deal with different time zones

Author: PhilippSalvisberg

sqldev/src/main/java/org/utplsql/sqldev/model/runner/Run.xtend

@@ -37,6 +37,7 @@ class Run extends AbstractModel {
 	String serverOutput
 	LinkedHashMap<String, Test> tests
 	String status
+	Long start
 
 	new(String reporterId, String connectionName, List<String> pathList) {
 		this.reporterId = reporterId
@@ -46,6 +47,11 @@ class Run extends AbstractModel {
 		this.tests = new LinkedHashMap<String, Test>
 	}
 
+	def void setStartTime(String startTime) {
+		this.startTime = startTime
+		start = System.currentTimeMillis
+	}
+		
 	def getName() {
 		val time = startTime.substring(11,19)
 		val conn = connectionName?.substring(15)