Remove '.' imports that break rollup (#924)

[gaberudy]

Current code causes rollup to fail due to the circular dependencies introduced by the from '.' imports:

(!) Circular dependency: src/graphql_tools/generate/index.ts -> src/graphql_tools/generate/addResolveFunctionsToSchema.ts -> src/graphql_tools/generate/index.ts
(!) Circular dependency: src/graphql_tools/generate/index.ts -> src/graphql_tools/generate/assertResolveFunctionsPresent.ts -> src/graphql_tools/generate/index.ts
(!) Circular dependency: src/graphql_tools/generate/index.ts -> src/graphql_tools/generate/attachConnectorsToContext.ts -> src/graphql_tools/generate/index.ts
(!) Circular dependency: src/graphql_tools/generate/index.ts -> src/graphql_tools/generate/buildSchemaFromTypeDefinitions.ts -> src/graphql_tools/generate/index.ts
(!) Circular dependency: src/graphql_tools/generate/index.ts -> src/graphql_tools/generate/checkForResolveTypeResolver.ts -> src/graphql_tools/generate/index.ts
(!) Circular dependency: src/graphql_tools/generate/index.ts -> src/graphql_tools/generate/concatenateTypeDefs.ts -> src/graphql_tools/generate/index.ts

This changes the imports to use direct reference to "peers" instead of to the containing module (index.ts)

[apollo-cla]

@gaberudy: Thank you for submitting a pull request! Before we can merge it, you'll need to sign the Meteor Contributor Agreement here: https://contribute.meteor.com/

[charlie-axsy]

@gaberudy I am also experiencing this issue. Are you still blocked by it? I see there has been no activity since you submitted the PR.

[gaberudy]

@charlie-axsy Yes! I’m still blocked by this.

I have a forked and patched version of GraphQL-tools checked into our repo waiting for this patch to be upstreamed :)

[gaberudy]

The failed tests are just timeout failures that this pull request has nothing to do with.

Please merge these simple changes

[yaacovCR]

See #1102 which fixes the unrelated errors, can be merged to demonstrate whether all tests pass for pending pull requests.

[yaacovCR]

Closed in favor of #1307