split into datasets

review fix

fix merge issues

fixed minddata lite build issues

Added Distributed sampler option

Fix style

Added input check

Added SwapRedBlue

fix cmakefile

fixed log statments in cpp UT tests

Removed extra fields in schema

Fixed test cases

Fixing CI

init remove storage op test case c++

remove source c++ files

remove graphengine changes

concat op

Truncate Pair

concat_op

remove graph engine changes

-replace switch'case by indexing

- Add test case
- Add constructors
- Add getItem string

- Fix bugs
- Add more tests

- Tensor iterator
- asNumpy
- TextFileDataset

- Tensor(Numpy)

- Super > 2D
- Add more test cases for GeneratorDataset

- Change StartAddr to GetBuffer and GetMutableNuffer

- Raise an error if batch is used with strings

Clean-up work

change to use __add__ operation instead ds.concat

Signed-off-by: Nleonwanghui <leon.wanghui@huawei.com>