Migrates users from the unitless, ambiguous plus(long) and minus(long) methods on various Joda-Time APIs to their Duration-accepting overloads.

​
This makes the units explicit, which prevents confusion and bugs.

More information: []
Tested:
    TAP --sample for global presubmit queue
    []

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=172455602

javatests/google/registry/tools/CreateTldCommandTest.java

@@ -37,6 +37,7 @@ import java.io.PrintStream;
 import java.math.BigDecimal;
 import org.joda.money.Money;
 import org.joda.time.DateTime;
+import org.joda.time.Duration;
 import org.joda.time.Interval;
 import org.junit.Before;
 import org.junit.Test;
@@ -333,7 +334,9 @@ public class CreateTldCommandTest extends CommandTestCase<CreateTldCommand> {
         IllegalArgumentException.class,
         "Don't pass both --initial_tld_state and --tld_state_transitions");
     runCommandForced(
-        String.format("--tld_state_transitions=%s=PREDELEGATION,%s=SUNRISE", now, now.plus(1)),
+        String.format(
+            "--tld_state_transitions=%s=PREDELEGATION,%s=SUNRISE",
+            now, now.plus(Duration.millis(1))),
         "--initial_tld_state=GENERAL_AVAILABILITY",
         "--dns_writers=VoidDnsWriter",
         "xn--q9jyb4c");