[RSR-893] Remove compas:flow and ExtRef bindings according to the VoltageLevel

[rahmananica]

User Story

Requirements:

XSD compas must be updated in order to develop this functionality.

Inputs:

• SCD file

US process description:

First of all, the processus has to check the value of /VoltageLevel@name in /Substation. In this table, we can see the values that it can take and the @FlowSourceVoltageLevel according to the value.

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VoltageLevel@name	FlowSourceVoltageLevel
3	HT
4	HT
5	THT
6	THT
7	THT

The process isn't applicable when VoltageLevel@name=0

The next step is to look for compas:flow that has @ExtRefiedName and @flowSourceVoltageLevel wich are not empty. In case @flowSourceVoltageLevel does not match its equivalent in /Substation/VoltageLevel@name then the compas:flow and ExtRef binding must be removed.

Note: if VoltageLevel@name has any other value than the values mentionned in the table then all the compas:flow with the attributes @FlowSourceVoltageLevel and @ExtRefiedName that are not empty should be removed