[WIP] Parameterize the start effector

[ygy]

• customize.skip as Brooklyn config key
• if customize.skip is set to true for an entity the driver will skip the the customize commands
• added skipInstallation as a parameter to the SoftwareProcess start effector
• if skipInstallation is used during the start effector invoking install.skip and customize.skip parameters will be set to true so install and customize phases are skipped and only launch is executed

[ivanayov]

LGTM

[neykov]

Overall it's a very useful thing to have when doing support. Don't like how the effector has side effects which will influence how future calls behave. Would be nice if the SKIP_CUSTOMIZE config is kept, but set out of the effector - either through curl of groovy. nitpick - having the SKIP_CUSTOMIZE with identical behaviour to SKIP_INSTALL.