[java] log exception message

[titusfortner]

Implements #11645

Code:

    ChromeOptions options = new ChromeOptions();
    options.setCapability("invalid", "value");
    WebDriver driver = new ChromeDriver(options);

Logging Current:

FINE: Executing: newSession [null, newSession {capabilities=[Capabilities {browserName: chrome, goog:chromeOptions: {args: [--remote-allow-origins=*], extensions: []}, invalid: value}]}]
FINE: Exception: [null, newSession {capabilities=[Capabilities {browserName: chrome, goog:chromeOptions: {args: [--remote-allow-origins=*], extensions: []}, invalid: value}]}]

Logging with PR:

FINE: Executing: newSession [null, newSession {capabilities=[Capabilities {browserName: chrome, goog:chromeOptions: {args: [--remote-allow-origins=*], extensions: []}, invalid: value}]}]
FINE: Exception: newSession Illegal key values seen in w3c capabilities: [invalid]