added group and domain params to importLdapUsers api call

Signed-off-by: Ian Duffy <ian@ianduffy.ie>
DestroyNetwork: fixed regression bug - the call always returns false after finishing the transaction. Return true instead.
CLOUDSTACK-3868: fixed "count" param in listUsageRecords API to return the actual number of records matching the search criteria. Used to return the wrong value - the number of records per page

Conflicts:
	server/src/com/cloud/usage/UsageServiceImpl.java
	utils/src/com/cloud/utils/db/GenericDaoBase.java