[HADOOP-14174] Set default ADLS access token provider type to ClientCredential

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.8.0
• Fix Version/s: 2.9.0, 3.0.0-alpha4, 2.8.2
• Component/s: fs/adl
• Target Version/s: 2.8.1
• Hadoop Flags: Incompatible change
• Release Note: Switch the default ADLS access token provider type from Custom to ClientCredential.
• Assignee: John Zhuge
• Reporter: John Zhuge
• Created: 11/Mar/17 01:17
• Updated: 08/Jun/17 00:13
• Resolved: 07/Apr/17 22:11

Description

Split off from a big patch in HADOOP-14038.

Switch fs.adl.oauth2.access.token.provider.type default from Custom to ClientCredential and add ADLS properties to core-default.xml.

Fix AdlFileSystem#getAccessTokenProvider which implies the provider type is Custom.
Fix several unit tests that set dfs.adls.oauth2.access.token.provider but does not set dfs.adls.oauth2.access.token.provider.type.