addressed requested changes to config and test

Author: shreyasun

src/config.json

@@ -44,6 +44,7 @@
     }
   ],
   "vgPath": "",
+  "dataPath": "exampleData",
   "internalDataPath": "exampleData/internal/",
   "tempDirPath": "temp",
   "fetchTimeout": 15,

src/end-to-end.test.js

@@ -339,7 +339,7 @@ describe("When we wait for it to load", () => {
 it("produces correct link for view before & after go is pressed", async () => {
   // First test that after pressing go, the link reflects the dat form
   const expectedLinkBRCA1 =
-    "http://localhost?name=snp1kg-BRCA1&tracks[0][trackFile]=exampleData%2Finternal%2Fsnp1kg-BRCA1.vg.xg&tracks[0][trackType]=graph&tracks[0][trackColorSettings][mainPalette]=greys&tracks[0][trackColorSettings][auxPalette]=ygreys&tracks[1][trackFile]=exampleData%2Finternal%2FNA12878-BRCA1.sorted.gam&tracks[1][trackType]=read&dataPath=default&region=17%3A1-100&bedFile=exampleData%2Finternal%2Fsnp1kg-BRCA1.bed&dataType=built-in&simplify=false";
+    "http://localhost?name=snp1kg-BRCA1&tracks[0][trackFile]=exampleData%2Finternal%2Fsnp1kg-BRCA1.vg.xg&tracks[0][trackType]=graph&tracks[0][trackColorSettings][mainPalette]=greys&tracks[0][trackColorSettings][auxPalette]=ygreys&tracks[1][trackFile]=exampleData%2Finternal%2FNA12878-BRCA1.sorted.gam&tracks[1][trackType]=read&region=17%3A1-100&bedFile=exampleData%2Finternal%2Fsnp1kg-BRCA1.bed&dataType=built-in&simplify=false";
   // Set up dropdown
   await act(async () => {
     let dropdown = document.getElementById("dataSourceSelect");