ShamirSecreSharing: some minor changes
Merge branch 'master' of https://github.com/bfh-evg/unicrypt

Conflicts:

src/main/java/ch/bfh/unicrypt/math/algebra/additive/classes/ECGroup.java

src/main/java/ch/bfh/unicrypt/math/algebra/additive/classes/ECGroupFp.ja
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