* sync with master, commit id: 02737b5e32

Added linter fix for album dataset

Added testDataset

Adding signature

Added JsonDataset example API

Example dataset

Resolving format

More fixing

Refactor

Small fix

Added compiling album dataset

Running tests

Added linter fix #1

Passing UT

Added dataset API

Addressing clang

Clang part 2

Fixing pass

Fixed tree check

lint fix

Added lint fix part 2

Signed-off-by: Jonathan Yan <jonathan.yan1@huawei.com>

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