Bump java-client from 2.7.7 to 2.7.9 in /modules/couchbase

[dependabot-preview]

Bumps java-client from 2.7.7 to 2.7.9.

Commits

• 7f60313 Prepare 2.7.9 Release
• 18599a3 JCBC-1387: Add support for ephemeral ejection methods.
• 4b5d097 SDKQE-289 Deploy Snapshots
• 590a168 Prepare 2.7.8 Release
• 94d7ae9 JVMCBC-713: Do not try to resolve in ConnectionString
• 53213fe JVMCBC-714: Do not resolve prelocated requests
• 949bef0 JCBC-1381: Properly close trace span of subdoc_mutate ops.
• 4f8836d JCBC-1373 Fix integration tests
• 05b4a87 Start 2.7.8 Development, part 2
• 9edc469 Start 2.7.8 development
• Additional commits viewable in compare view

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