Vector API unit tests for missed public api code coverage

Vector API unit tests coverage needs to be improved.
The latest Public Vector API code coverage results are: 90% (463/9/522)
 ByteVector 93% (76/2/84)
 DoubleVector 90% (70/2/80)
 FloatVector 90% (70/2/80)
 IntVector 94% (78/1/84)
 LongVector 95% (75/0/79)
 ShortVector 93% (77/1/84)
 VectorMask 57% (4/0/7)
 VectorOperators$Conversion 25% (1/0/4)
 VectorShape 100% (4/1/5)
 VectorShuffle 55% (6/0/11)
 VectorSpecies 50% (2/0/4)