Acceptance-tests to recover on browser connection to the browser failures

[jachro]

It looks that from time to time webdriver cannot connect to the browser. The tests throws an exception like below and fails the scenario. Ideally, they should simply retry (maybe re-new the driver)

 org.openqa.selenium.WebDriverException: java.net.ConnectException: Failed to connect to localhost/127.0.0.1:12479
[info] Build info: version: '3.141.59', revision: 'e82be7d358', time: '2018-11-14T08:17:03'
[info] System info: host: 'ci-renku-2367-acceptance-tests', ip: '10.42.11.28', os.name: 'Linux', os.arch: 'amd64', os.version: '5.4.0-72-generic', java.version: '11.0.13'
[info] Driver info: driver.version: RemoteWebDriver
[info]   ...
[info]   Cause: java.net.ConnectException: Failed to connect to localhost/127.0.0.1:12479
[info]   at okhttp3.internal.connection.RealConnection.connectSocket(RealConnection.java:247)
[info]   at okhttp3.internal.connection.RealConnection.connect(RealConnection.java:165)
[info]   at okhttp3.internal.connection.StreamAllocation.findConnection(StreamAllocation.java:257)
[info]   at okhttp3.internal.connection.StreamAllocation.findHealthyConnection(StreamAllocation.java:135)
[info]   at okhttp3.internal.connection.StreamAllocation.newStream(StreamAllocation.java:114)
[info]   at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:42)
[info]   at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
[info]   at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
[info]   at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:93)
[info]   at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
[info]   ...
[info]   Cause: java.net.ConnectException: Connection refused (Connection refused)
[info]   at java.base/java.net.PlainSocketImpl.socketConnect(Native Method)
[info]   at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:399)
[info]   at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:242)
[info]   at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:224)
[info]   at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
[info]   at java.base/java.net.Socket.connect(Socket.java:609)
[info]   at okhttp3.internal.platform.Platform.connectSocket(Platform.java:129)
[info]   at okhttp3.internal.connection.RealConnection.connectSocket(RealConnection.java:245)
[info]   at okhttp3.internal.connection.RealConnection.connect(RealConnection.java:165)
[info]   at okhttp3.internal.connection.StreamAllocation.findConnection(StreamAllocation.java:257)