Cypress>=3.3.1 readFile() does not expect a relative file-path starting with /

See:
https://github.com/cypress-io/cypress/issues/4352#issuecomment-507963062

Issue-ID: VID-687
Change-Id: I4f3292e80d22d217d9bd33c685766efd5a8f4d8f
Signed-off-by: Ittay Stern <ittay.stern@att.com>
diff --git a/vid-webpack-master/cypress/integration/iFrames/searchExistingInstance.e2e.ts b/vid-webpack-master/cypress/integration/iFrames/searchExistingInstance.e2e.ts
index 0e68930..2617354 100644
--- a/vid-webpack-master/cypress/integration/iFrames/searchExistingInstance.e2e.ts
+++ b/vid-webpack-master/cypress/integration/iFrames/searchExistingInstance.e2e.ts
@@ -62,7 +62,7 @@
         response: searchServiceInstancesResponse
       }).as('search_service_instances');
 
-    cy.readFile('/cypress/support/jsonBuilders/mocks/jsons/serviceModels/serviceForNewViewEdit.json').then((res) => {
+    cy.readFile('cypress/support/jsonBuilders/mocks/jsons/serviceModels/serviceForNewViewEdit.json').then((res) => {
       jsonBuilderAndMock.basicJson(
         res,
         Cypress.config('baseUrl') + `/rest/models/services/${SERVICE_MODEL_VERSION_ID}`,