Fix integer input parsing

[darrellwarde]

Description

Remove the parse function of the Int scalar, and instead modify the resolve tree used to generate Cypher, replacing any integer values with Neo4j Integer values, which are checked against the schema to ensure they are of the correct type.

Issue

• LIMIT: Invalid input. '10.0' is not a valid value. Must be a non-negative integer.", #208
• Neo4jGraphQL contaminates the global scope/and or mergeSchemas #186
• Int cannot represent non-integer value. Incorrect Int Scalar type. #167

Checklist

The following requirements should have been met (depending on the changes in the branch):

• Documentation has been updated
• TCK tests have been updated
• Integration tests have been updated
• Example applications have been updated
• New files have copyright header
• CLA (https://neo4j.com/developer/cla/) has been signed

[darrellwarde]

In lieu of testing due to inability to reproduce, sent a build of this branch to @tlester who confirmed that his problems with Int values are no more!