Fix deliverable selection random test

00:12:43.901 [INFO] [chrome #0-1]     A user can select a deliverable item in the main grid and sync the right tab
00:12:43.901 [INFO] [chrome #0-1]       ✓ Michele@nbm.com is logged using password Michele_1
00:12:43.901 [INFO] [chrome #0-1]       ✓ open "December Campaign - 2017" project and deliverable "On Location Banners" view page
00:12:43.901 [INFO] [chrome #0-1]       ✓ preview is not displayed
00:12:43.901 [INFO] [chrome #0-1]       ✓ click on deliverable item at index 0
00:12:43.901 [INFO] [chrome #0-1]       1) deliverable items card "Deliverable Work in Progress" is opened
00:12:43.901 [INFO] [chrome #0-1]       !! preview is displayed
00:12:43.901 [INFO] [chrome #0-1]
00:12:43.901 [INFO] [chrome #0-1]
00:12:43.901 [INFO] [chrome #0-1] 119 passing (3m, 6s)
00:12:43.901 [INFO] [chrome #0-1] 1 pending
00:12:43.901 [INFO] [chrome #0-1] 1 failing
00:12:43.901 [INFO] [chrome #0-1]
00:12:43.901 [INFO] [chrome #0-1] 1) A user can select a deliverable item in the main grid and sync the right tab159 deliverable items card "Deliverable Work in Progress" is opened:
00:12:43.901 [INFO] [chrome #0-1] Promise was rejected with the following reason: no such session
00:12:43.901 [INFO]   (Driver info: chromedriver=2.36.540471 (9c759b81a907e70363c6312294d30b6ccccc2752),platform=Linux 4.4.0-98-generic x86_64)
00:12:43.901 [INFO] [chrome #0-1] Error: Promise was rejected with the following reason: no such session
00:12:43.901 [INFO] [chrome #0-1]     at DeliverableItemsCard.el.waitForVisible (src/features/helpers/shadow-dom.js:79:55)
00:12:43.901 [INFO] [chrome #0-1]     at DeliverableItemsCard.waitForVisible (src/features/pages/base.js:46:35)
00:12:43.901 [INFO] [chrome #0-1]     at World.<anonymous> (src/features/step_definitions/deliverables.js:449:17)
00:12:43.901 [INFO] [chrome #0-1]     at Promise.F (node_modules/core-js/library/modules/_export.js:36:28)
00:12:43.901 [INFO] [chrome #0-1]     (Driver info: chromedriver=2.36.540471 (9c759b81a907e70363c6312294d30b6ccccc2752),platform=Linux 4.4.0-98-generic x86_64)
00:12:43.901 [INFO] [chrome #0-1]     at elements("* >>> .iron-collapse-opened") - isVisible.js:54:17
00:12:43.901 [INFO] [chrome #0-1]     at isVisible("* >>> .iron-collapse-opened") - waitForVisible.js:73:22