Add Kubernetes class to track API connection settings
This patch moves get_resources() routine into Kubernetes
class. It's object now holds all needed API connection
properties and tracks it's state to avoid passing these
settings through intermediary functions all the way down
to actual API calling routine.
Additional checks are added in get_resources() to produce
more meaningfull debug info in case of connection failure.
Change-Id: Ia50fa086d22466c0fbed9eb677d2dc52709bef9f
Issue-ID: OOM-1806
Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>