fix(gatsby-source-mongodb): sanitize name correctly (#11294)

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## Description

This is the PR for issue #11277. It fixes the sanitizeName error.

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## Related Issues

Related to #11277
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  Link to the issue that is fixed by this PR (if there is one)
  e.g. Fixes #1234, Addresses #1234, Related to #1234, etc.
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Co-authored-by: Dustin Schau <DSchau@users.noreply.github.com>
Co-authored-by: Ward Peeters <ward@coding-tech.com>

packages/gatsby-source-mongodb/src/__tests__/sanitize-name.js

@@ -0,0 +1,7 @@
+const sanitizeName = require(`../sanitize-name`)
+
+it(`removes unsupported characters from name`, () => {
+  const name = `one-two-three`
+  const output = sanitizeName(name)
+  expect(output).not.toContain(`-`)
+})

packages/gatsby-source-mongodb/src/gatsby-node.js

@@ -1,6 +1,7 @@
 const MongoClient = require(`mongodb`).MongoClient
 const crypto = require(`crypto`)
 const prepareMappingChildNode = require(`./mapping`)
+const sanitizeName = require(`./sanitize-name`)
 const queryString = require(`query-string`)
 
 exports.sourceNodes = (
@@ -130,10 +131,6 @@ function createNodes(
   })
 }
 
-function sanitizeName(s) {
-  return s.replace(/[^_a-zA-Z0-9]/, ``).replace(/\b\w/g, l => l.toUpperCase())
-}
-
 function getConnectionExtraParams(extraParams) {
   let connectionSuffix
   if (extraParams) {

packages/gatsby-source-mongodb/src/sanitize-name.js

@@ -0,0 +1,3 @@
+module.exports = function sanitizeName(s) {
+  return s.replace(/[^_a-zA-Z0-9]/g, ``).replace(/\b\w/g, l => l.toUpperCase())
+}