Fix version-branch-template for v14.16, v15.11 and v16.7

[rishabhtanwar29]

Description

1. Update branches for 14.16, 15.11 and 16.7 from dev to stable.
2. Update MVU source version from dev to stable.
3. Fix singledb-version-upgrade from 16.6 to 16.7

Signed-off-by: Rishabh Tanwar [email protected]

Test Scenarios Covered

• Use case based -

• Boundary conditions -

• Arbitrary inputs -

• Negative test cases -

• Minor version upgrade tests -

• Major version upgrade tests -

• Performance tests -

• Tooling impact -

• Client tests -

Check List

• Commits are signed per the DCO using --signoff

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[coveralls]

Pull Request Test Coverage Report for Build 13199379135

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.003%) to 74.635%

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Totals
Change from base Build 13122325813:	0.003%
Covered Lines:	46852
Relevant Lines:	62775

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💛 - Coveralls