Review Request 31608: LENS-364 Open session with wrong db is returning 404 but session is getting created with default db

[Jaideep dhok]

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Review request for lens.


Bugs: LENS-364
    https://issues.apache.org/jira/browse/LENS-364


Repository: lens


Description
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1. Closing session before throwing 404.
2. Closing session in case db exist check throws exception


Diffs
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lens-server/src/main/java/org/apache/lens/server/session/HiveSessionService.java
 435eda9d6d38724e7e7ace063d49064a79a1f999 

Diff: https://reviews.apache.org/r/31608/diff/


Testing
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Checked log statement in case of invalid DB.
No new test added as test for open session with invalid DB already exists.

Awaiting test output.


Thanks,

Jaideep dhok