Replaced SimpleDateFormat with FastDateFormat in thread-critical places only

Author: NicoPiel

server/src/com/mirth/connect/client/core/api/providers/CalendarParamConverterProvider.java

@@ -12,7 +12,7 @@
 import java.lang.annotation.Annotation;
 import java.lang.reflect.Type;
 import java.text.ParseException;
-import java.text.SimpleDateFormat;
+import org.apache.commons.lang3.time.FastDateFormat;
 import java.util.Calendar;
 
 import javax.inject.Singleton;
@@ -25,7 +25,7 @@
 @Singleton
 public class CalendarParamConverterProvider implements ParamConverterProvider {
 
-    private static final SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ");
+    private static final FastDateFormat format = FastDateFormat.getInstance("yyyy-MM-dd'T'HH:mm:ss.SSSZ");
 
     @Override
     public <T> ParamConverter<T> getConverter(Class<T> rawType, Type genericType, Annotation[] annotations) {

server/src/com/mirth/connect/plugins/serverlog/ServerLogItem.java

@@ -10,14 +10,14 @@
 package com.mirth.connect.plugins.serverlog;
 
 import java.io.Serializable;
-import java.text.SimpleDateFormat;
+import org.apache.commons.lang3.time.FastDateFormat;
 import java.util.Date;
 
 import org.apache.commons.lang3.StringUtils;
 
 public class ServerLogItem implements Serializable {
 
-    public static SimpleDateFormat DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
+    public static FastDateFormat DATE_FORMAT = FastDateFormat.getInstance("yyyy-MM-dd HH:mm:ss.SSS");
 
     private String serverId;
     private Long id;