Revert "Rewriting vs expansions protocol"

This reverts commit 18a4066.

Author: Dtphelan1

src/helpers/valueSets/vs-expansion-explained.md

@@ -5,6 +5,5 @@ Follow the steps below to generate a new set of valuesets based on the latest ve
 1. Clone the fhir-mCODE-ig locally and build the IG. This will, among other things, ensure you have all mCODE Valuesets locally. You can find that code and setup instructions here on [HL7's GitHub](https://github.com/HL7/fhir-mCODE-ig).
 2. Move all ValueSets into a folder, for ease of access by the MEF'S `vs-expansion-script`. Below is a series of commands that will help with this (on OSX), but you could also do this manually.
    `cd some/path/to/local/fhir-mCODE-ig/output && mkdir valuesets && find * -name "Value*.json" | xargs -I '{}' cp {} ./valuesets`
-3. Remove all irrelevant ValueSets from this folder, leaving behind only the ones to be expanded. 
-4. In the MEF, update the`PREEXPANSIONPATH` global variable in `vs-expansion-script.js` to point to the folder made to house the ValueSets in step 2.
-5. Run `vs-expansion-script.js` using node.
+3. In the MEF, update the`PREEXPANSIONPATH` global variable in `vs-expansion-script.js` to point to the folder made to house the ValueSets in step 2.
+4. Run `vs-expansion-script.js` using node.

src/helpers/valueSets/vs-expansion-script.js

@@ -51,7 +51,6 @@ function expandVs() {
     vsPaths = listVsForExpansion();
   } catch (e) {
     console.error('FAILURE: PREEXPANSIONPATH does not point to a valid directory; make sure you update this variable based on you local machine');
-    process.exit(1);
   }
   // Aggregate requests for each vsPath we have
   const requests = [];