Add staging_disk_limit_mb to CC spec
Bump cloud_controller_ng and dea_next

* Update default staging_disk_limit_mb to 4G in cloud controller specs
* Make sure to add properties in cloud controller specs to both the clock and
  worker specs as well.

[#69204488]

Signed-off-by: Kai Zhang <kaizhang@cn.ibm.com>
Bump cloud_controller_ng in cf relase

[#69204488]

Signed-off-by: Kai Zhang <kaizhang@cn.ibm.com>