[contextkit] variant type passing

QVariant is parsing provided string, so now QVariant::toString() and
ctor are used to pass values, relying on correct conversion

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>
fix path construction to statefs file

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>
ckit property subscription and source access fixes

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>
[service] enabling and starting properly

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>
[rpm] installation and package content changes

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>
[cmake] automoc

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>