[TESTBUG] Fix incorrect Vector API test output message

Some vector api tests have incorrect output messages if assertion fails.

For example, here is part of the fail logs in VectorReshapeTests:
```
  test VectorReshapeTests.testCastFromByte(byte(i)): successtest VectorReshapeTests.testCastFromByte(byte(i)): success
  test VectorReshapeTests.testCastFromDouble(double(i)): successtest VectorReshapeTests.testCastFromFloat(float(i)): success
  test VectorReshapeTests.testCastFromInt(int(i)): successtest VectorReshapeTests.testCastFromLong(long(i)): success
  test VectorReshapeTests.testCastFromShort(short(i)): success
  input: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]
  Failing with Species[byte, 16, S_128_BIT]->Species[double, 2, S_128_BIT] (reinterpret), partLimit=0, block=16, part=0, origin=0
  expect: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]
  output: [1, 2, 3, 4, 5, 6, 7, 8, 1, 0, 0, 0, 0, 0, 0, 0]
  test VectorReshapeTests.testRebracket128(byte(i)): failure
  java.lang.AssertionError: arrays differ firstly at element [8]; expected value is <1> but was <9>.
    at org.testng.Assert.fail(Assert.java:94)
    at org.testng.Assert.assertEquals(Assert.java:774)
    at org.testng.Assert.assertEquals(Assert.java:748)
```
It should be "expected value is <9> but was <1>". The arguments of Assert.assertEquals() were incorrectly swapped. This doesn't have any influence to the tests effectivity. However, the incorrect message is confusing which might mislead someone. It's better to fix them all.