Fix filter_properties of unshelve API

When unshelving a shelved server, nova-scheduler fails because nova-conductor
of current unshelve feature passes an empty list as filter_properties, and
nova-scheduler handles it as a dict.

To fix the problem, this patch changes the filter_properties to an empty dict.

Closes-Bug: #1233563

Change-Id: I2c7a2a743a8142af0be0a182067f3295980aa997
Add V3 API samples for consoles

Partially implements blueprint v3-api-unittests

Change-Id: I84ee6ca7d7c7113e97b7eadde6eeac104bffb6ff
Merge "Fix filter_properties of unshelve API"