Merge branch '7-sdo-and-do-do-not-follow-the-same-rule-for-the-name-attribute-first-letter-lower-upper-case' into 'master'

Resolve "SDO and DO do not follow the same rule for the name attribute (first letter lower / upper case)"

Closes #7

See merge request RiseClipseGroup/RiseClipseOCLConstraints_SCL2003!5

Resolve "update to name changes in SCL metamodel"

Closes #6

See merge request RiseClipseGroup/RiseClipseOCLConstraints_SCL2003!4

Resolve "Keep only required"

Closes #5

See merge request RiseClipseGroup/RiseClipseOCLConstraints_SCL2003!3

Resolve "Helpers should be in a SCL class" : this version gives same OCL validation results than previous one

Closes #3

See merge request RiseClipseGroup/RiseClipseOCLConstraints_SCL2003!2

Resolve "Unwanted characters in SemanticConstraints/VoltageLevel.ocl"

Closes #2

See merge request !1