DevMgr: attachAllUnattachedDevsFrom: now takes sh_ptr<vector<Spec>>

This method now accepts a sh_ptr<vector<DeviceAttachmentSpec>> to
tell it specifically which specs to attempt to attach.

This enables us to implement different frontends that supply it
with collections of devices from different sources (GUI, cmdline,
previously failed-to-attach/hot-removed devices, etc).

SMO temporarily initializes none of the devices from the cmdline
during this commit as we transition to implementing the cmdline
collection frontend.

smocore/include/deviceManager/deviceManager.h

@@ -71,6 +71,7 @@ public:
 		detachAllAttachedDeviceRolesCbFn;
 
 	void attachAllUnattachedDevicesFromReq(
+		const std::shared_ptr<std::vector<DeviceAttachmentSpec>> &specs,
 		Callback<attachAllUnattachedDevicesFromReqCbFn> cb);
 	void detachAllAttachedDeviceRoles(
 		Callback<detachAllAttachedDeviceRolesCbFn> cb);