[CICDANSIBLE] Add feature to set custom docker storage size on nodes

This allows setting custom size for volume attached to nodes via
ansible variable

Change-Id: Ie7c9562403f3b330f52136adc5dc8a11f85bc950
Issue-ID: OOM-2846
Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>
4 files changed