Typo
Draft work for issue #9

This draft code is still broken in the way it uses Gson to get users,
groups from the files:

$ java -cp
target/forgerock-rest-demo-1.0.0-SNAPSHOT.jar:/Users/mark/.m2/repository
/com/google/code/gson/gson/2.2.4/gson-2.2.4.jar
org.forgerock.commons.doc.Main `pwd`/Users.json `pwd`/Groups.json
Exception in thread "main" com.google.gson.JsonSyntaxException:
java.lang.IllegalStateException: Expected BEGIN_OBJECT but was
BEGIN_ARRAY at line 1 column 2
	at
com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(
ReflectiveTypeAdapterFactory.java:176)
	at com.google.gson.Gson.fromJson(Gson.java:803)
	at com.google.gson.Gson.fromJson(Gson.java:741)
	at org.forgerock.commons.doc.Provisioner.addUsers(Provisioner.java:72)
	at org.forgerock.commons.doc.Main.main(Main.java:44)
Caused by: java.lang.IllegalStateException: Expected BEGIN_OBJECT but
was BEGIN_ARRAY at line 1 column 2
	at com.google.gson.stream.JsonReader.beginObject(JsonReader.java:374)
	at
com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(
ReflectiveTypeAdapterFactory.java:165)
	... 4 more