Smoke test: Flaky search test

[joaomoreno]

2018-06-05T09:34:38.9791401Z   1) Test Search dismisses result & checks for correct result number:
2018-06-05T09:34:38.9792011Z      Error: Timeout: get text content 'div[id="workbench.view.search"] .search-view .results .monaco-tree-rows>:nth-child(1) .filematch a.label-name' after 20 seconds.
2018-06-05T09:34:38.9792392Z       at D:\a\1\s\test\smoke\out\vscode\code.js:139:23
2018-06-05T09:34:38.9792626Z       at Generator.next (<anonymous>)
2018-06-05T09:34:38.9792880Z       at fulfilled (D:\a\1\s\test\smoke\out\vscode\code.js:8:58)
2018-06-05T09:34:38.9793118Z       at <anonymous>

https://vscode.visualstudio.com/VSCode/_build/index?buildId=1421&_a=summary