[TASK] Update version information for V2.7.2

Change-Id: I1829d767b4ca18c8a098002f04e1266a81cdd3ae

[TASK] Update release information for V2.7.1

Change-Id: I80c1bcdd2d3e81a8ec0ed9221a8720d013045587

Final release of openPOWERLINK V2.7.0

Final release of openPOWERLINK V2.6.2

Final release of openPOWERLINK V2.6.1

Final release of openPOWERLINK V2.6.0

Final release of openPOWERLINK V2.5.2

Final release of openPOWERLINK V2.5.1

Final release of openPOWERLINK V2.5.0

Final release of openPOWERLINK V2.4.1