Using new attribute schema for all resources

Currently resources use old style of attribute schema. For example:

    attribute_name: _('Description')

This patch contains changes to migrate for new attribute Schema class.
For example:

    attribute_name: attributes.Schema(_('Descriprion'))

Partial-Bug: #1307319

Change-Id: I54c7b9d481655b0051d0f7ff668672011ac882e9
Merge "Using new attribute schema for all resources"