Reimplimented symbolic link of bdbag cookie.

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PR checklist

• This comment contains a description of changes (with reason)
• [ ] If you've fixed a bug or added code that should be tested, add tests!
• [ ] Documentation in docs is updated
• ~~[ ] Replace dag.png with the most recent CI pipeline integrated_pe artifact
• [ ] Replace software_versions_mqc.yaml with the most recent CI pipeline generateVersions artifact
• [ ] Replace software_references_mqc.yaml with the most recent CI pipeline generateVersions artifact
• CHANGELOG.md is updated
• README.md is updated
• [ ] LICENSE.md is updated with new contributors
• [ ] Docker images moved to production release and changed in pipeline
• [ ] Docker images used in the CI unit tests match those used in pipeline

• Close issue
  Closes #132 (closed)

/cc @ghenry @venkat.malladi

CHANGELOG.md

@@ -3,6 +3,7 @@
 
 **Background**
 * Corrected file search parameters due to name inconsistency (#129)
+* Re-implemented sym-link for deriva cookie into ~/.bdbag/ for bdbag fetch to use (#132)
 
 # v2.0.0
 **User Facing**