cli.print_attribute: Convert values to strings

When output_for_cli was called directly, rather than for values
received through XML or JSON API, joining multiple values failed
on non-strings such as DN objects.

Convert output to strings before printing it out.
Remove missing VERSION warning in dnsrecord-mod

dnsrecord-mod may call dnsrecord-delentry command when all records
are deleted. However, the version was not passwd to delentry and
it resulted in a warning.

https://fedorahosted.org/freeipa/ticket/4120
Increase service startup timeout default.

https://fedorahosted.org/freeipa/ticket/4078