Title: Configuring Durations
The time based configuration properties of containers and beans support
plain english, such as:

 - "1 hour" 
 - "27 minutes"
 - "10 seconds"

For convenience it is possible to specify a _compound_ form, such as:

 - "3 days and 2 hours"
 - "1 hour, 45 minutes"
 - "15 minutes, 23 seconds, and 10 milliseconds"

Spaces are also optional between the number and the time unit, which can be nice when using the abbreviated forms:

 - "1hr" 
 - "27m"
 - "10s"
 - "3d and 2hr"
 - "1hr, 45min"
 - "15m, 23s, and 10ms"


Abbreviations are accepted as follows:


      if (u.equalsIgnoreCase("NANOSECONDS")) return TimeUnit.NANOSECONDS;
      if (u.equalsIgnoreCase("NANOSECOND")) return TimeUnit.NANOSECONDS;
      if (u.equalsIgnoreCase("NANOS")) return TimeUnit.NANOSECONDS;
      if (u.equalsIgnoreCase("NANO")) return TimeUnit.NANOSECONDS;
      if (u.equalsIgnoreCase("NS")) return TimeUnit.NANOSECONDS;
    
      if (u.equalsIgnoreCase("MICROSECONDS")) return TimeUnit.MICROSECONDS;
      if (u.equalsIgnoreCase("MICROSECOND")) return TimeUnit.MICROSECONDS;
      if (u.equalsIgnoreCase("MICROS")) return TimeUnit.MICROSECONDS;
      if (u.equalsIgnoreCase("MICRO")) return TimeUnit.MICROSECONDS;
    
      if (u.equalsIgnoreCase("MILLISECONDS")) return TimeUnit.MILLISECONDS;
      if (u.equalsIgnoreCase("MILLISECOND")) return TimeUnit.MILLISECONDS;
      if (u.equalsIgnoreCase("MILLIS")) return TimeUnit.MILLISECONDS;
      if (u.equalsIgnoreCase("MILLI")) return TimeUnit.MILLISECONDS;
      if (u.equalsIgnoreCase("MS")) return TimeUnit.MILLISECONDS;
    
      if (u.equalsIgnoreCase("SECONDS")) return TimeUnit.SECONDS;
      if (u.equalsIgnoreCase("SECOND")) return TimeUnit.SECONDS;
      if (u.equalsIgnoreCase("SEC")) return TimeUnit.SECONDS;
      if (u.equalsIgnoreCase("S")) return TimeUnit.SECONDS;
    
      if (u.equalsIgnoreCase("MINUTES")) return TimeUnit.MINUTES;
      if (u.equalsIgnoreCase("MINUTE")) return TimeUnit.MINUTES;
      if (u.equalsIgnoreCase("MIN")) return TimeUnit.MINUTES;
      if (u.equalsIgnoreCase("M")) return TimeUnit.MINUTES;
    
      if (u.equalsIgnoreCase("HOURS")) return TimeUnit.HOURS;
      if (u.equalsIgnoreCase("HOUR")) return TimeUnit.HOURS;
      if (u.equalsIgnoreCase("HRS")) return TimeUnit.HOURS;
      if (u.equalsIgnoreCase("HR")) return TimeUnit.HOURS;
      if (u.equalsIgnoreCase("H")) return TimeUnit.HOURS;
    
      if (u.equalsIgnoreCase("DAYS")) return TimeUnit.DAYS;
      if (u.equalsIgnoreCase("DAY")) return TimeUnit.DAYS;
      if (u.equalsIgnoreCase("D")) return TimeUnit.DAYS;