Create common fragments

[mattkrick]

look at this

  repository_2: repository(owner: \"ParabolInc\", name: \"parabol\") {
    issue(number: 5811) {
      __typename
      ... on Issue {
        __typename
        title
        number
      }
      id
      __typename
      id
      __typename
      id
      __typename
      ... on Issue {
        __typename
        repository {
          nameWithOwner
          id
        }
      }
      id
      __typename
      id
      __typename
      ... on Issue {
        __typename
        ...PokerEstimateHeaderCardGitHub_issue
      }
      id
    }
  }
  repository_4: repository(owner: \"ParabolInc\", name: \"parabol\") {
    issue(number: 5812) {
      __typename
      ... on Issue {
        __typename
        title
        number
      }
      id
      __typename
      id
      __typename
      id
      __typename
      ... on Issue {
        __typename
        repository {
          nameWithOwner
          id
        }
      }
      id
      __typename
      id
      __typename
      ... on Issue {
        __typename
        ...PokerEstimateHeaderCardGitHub_issue
      }
      id
    }
  }

these 2 are identical except for the varDefs.
we should make these become the following:

fragment issue1 on Issue {
   __typename
      ... on Issue {
        __typename
        title
        number
      }
      id
      __typename
      id
      __typename
      id
      __typename
      ... on Issue {
        __typename
        repository {
          nameWithOwner
          id
        }
      }
      id
      __typename
      id
      __typename
      ... on Issue {
        __typename
        ...PokerEstimateHeaderCardGitHub_issue
      }
      id
}
  repository_2: repository(owner: \"ParabolInc\", name: \"parabol\") {
    issue(number: 5811) {
        ...issue1
    }
  }
  repository_4: repository(owner: \"ParabolInc\", name: \"parabol\") {
    issue(number: 5812) {
        ...issue1 
    }
  }

i think this is easy to do using the wrapper param.
it plays with #2 nicely, too.
basically instead of inlining ...info we do the following:

• create a fragment for ...info
• replace ...info with ...info1 (or whatever it is)
• make sure that the info object is the same every time & then just dont' create that fragment next time

then, when it comes up again,