Added attribute-resolver.xml template file

Added an unmodified attribute-resolver.xml template file to be modified
with custom user supplied values.
Added ldap DataConnector configuration

Configuring the DataConnector element for LDAP should allow the
attribute resolver to be linked to the LDAP server.
Added attribute filter url prompts to bootstrap

Script will now request the unique attribute filter policy url which
will be stored in group vars for other playbooks that require it.
Added service.xml.j2 template file

Template file for service.xml has been added in antiipation of future
functionality and integration being implemented.
Modified service.xml.j2 template for attribute

resolver integration. This should allow user provided values to
appropriately configure this file.
Added new task to write service.xml file

Tasks has been added to write new service.xml file from the template to
allow proper attribute filter functionality.
Added new task to write attribute-resolver file

New task has been added to copy over existing attribute-resolver.xml
file with a new one from template. This enables the LDAP data connector
and a number of custom configurations necessary for proper operation.
Merge pull request #114 from ausaccessfed/feature/add-attribute-filter

Added prompts for attribute filter URL and service.xml modifications
Resolves #113 and #104