Waiting for segments and metrics list updates, removing init fixture db

frontend/test/e2e/admin/datamodel.spec.js

@@ -78,7 +78,7 @@ describe("admin/datamodel", () => {
 
             await findElement(driver, "button.Button.Button--primary").click();
 
-            expect(await findElement(driver, "#SegmentsList tr:first-child td:first-child").getText()).toEqual("Gmail users");
+            expect((await waitForElement(driver, "#SegmentsList tr:first-child td:first-child")).getText()).toEqual("Gmail users");
 
             // add a metric
             await waitForAndClickElement(driver, "#MetricsList a.text-brand");
@@ -91,7 +91,7 @@ describe("admin/datamodel", () => {
 
             await findElement(driver, "button.Button.Button--primary").click();
 
-            expect(await findElement(driver, "#MetricsList tr:first-child td:first-child").getText()).toEqual("User count");
+            expect((await waitForElement(driver, "#MetricsList tr:first-child td:first-child")).getText()).toEqual("User count");
         });
     });