[GOBBLIN-334] Implement SharedResourceFactory for LineageInfo

[zxcware]

Dear Gobblin maintainers,

JIRA

• My PR addresses the following Gobblin JIRA issues and references them in the PR title.
  • https://issues.apache.org/jira/browse/GOBBLIN-334

Description

• Here are some details about my PR:
  • Currently, setting or putting a DatasetDescriptor with LineageInfo creates a new DatasetResolver every time. It's not performant.
  • The SharedResourceFactory (LineageInfoFactory) creates a single job level LineageInfo instance so that one job process creates only one LineageInfo object, hence only one DatasetResolver object.

Tests

• My PR adds the following unit tests:
  • LineageEventTest

Commits

• My commits all reference JIRA issues in their subject lines, and I have squashed multiple commits if they address the same issue. In addition, my commits follow the guidelines from "How to write a good git commit message":
  1. Subject is separated from body by a blank line
  2. Subject is limited to 50 characters
  3. Subject does not end with a period
  4. Subject uses the imperative mood ("add", not "adding")
  5. Body wraps at 72 characters
  6. Body explains "what" and "why", not "how"

[zxcware]

@ibuenros Please review.

[ibuenros]

Can you rename to something more descriptive? Maybe StringNameSharedResourceKey

[zxcware]

+1

[ibuenros]

Why do you need a name instead of just an EmptyKey?

[zxcware]

+1

[ibuenros]

+1