Fix [2845178] - PackIn data failing if ran second time and first failed

https://sourceforge.net/tracker/?func=detail&aid=2845178&group_id=176962&atid=879332

base/src/org/adempiere/pipo/IDFinder.java

@@ -398,4 +398,9 @@ public class IDFinder {
 		
 		return id;
 	}
+	
+	public static void clearIDCache() {
+		idCache.clear();
+	}
+	
 }

base/src/org/adempiere/pipo/PackIn.java

@@ -156,6 +156,9 @@ public class PackIn extends SvrProcess {
 		X_AD_Package_Imp_Proc adPackageImp = new X_AD_Package_Imp_Proc(getCtx(),
 				p_PackIn_ID, null);
 
+		// clear cache of previous runs
+		IDFinder.clearIDCache();
+
 		// Create Target directory if required
 		String packageDirectory = adPackageImp.getAD_Package_Dir();
 		if (packageDirectory == null || packageDirectory.trim().length() == 0) {