Auto-generate non semi-ring operations code

[FlorentinD]

Currently there exist two version of some files like org.ejml.sparse.csc.mult.ImplSparseSparseMultWithSemiRing_DSCC.
As the one without semi-rings is just the in-lined version of the PLUS, TIMES semi-ring, it should be possible to auto-generate instead of having nearly identical files.

Steps:

0. copy the Semi-Ring version
1. remove the semi-ring from the signature and java-doc
2. replace semiRing.add.id with 0 and semiRing.mult.id with 1
3. replace semiRing.add.func.apply(x, y) with x + y (same for semiRing.mult.func.apply but with *)