CLOUDSTACK-6530: Populate the first class entities in the context to be available for publishing more information for the event bus, checking the displayable property etc.
Fixed CLOUDSTACK-6509 Cannot import multiple LDAP/AD users into a cloudstack account

Conflicts:
	api/src/com/cloud/user/AccountService.java
	plugins/user-authenticators/ldap/src/org/apache/cloudstack/api/command/LdapCreateAccountCmd.java
	plugins/user-authenticators/ldap/src/org/apache/cloudstack/api/command/LdapImportUsersCmd.java

Signed-off-by: Koushik Das <koushik@apache.org>