sap_control_exec : passed sid is ignored

[nbttmbrg]

Hello everybody,

The role is supposed to read the second keyword of sap_control_function to determine whether it should run the function against every SID discovered by the SAP facts, or filter on the sap_sid passed as an argument to the role.

This behavior is now broken, probably due to the deprecation of the "param" argument in sap_system_facts. Every function is considered an "all" function.
The previous tasks are also now useless, since they were only used to set the fact used by that (now-commented) "param" argument.

Will add that to my previous PR. (edit: in the end added it to MR #39 instead)