reloadSession doesn't work in Appium

[xlenz]

Environment (please complete the following information):

• WebdriverIO version: 5.4.13
• Mode: WDIO Testrunner

Config of WebdriverIO
Use Appium

Describe the bug
reloadSession doesn't work when using Appium because sessionId is not set (it is missing in response)

To Reproduce
reloadSession()

Expected behavior
reloadSession should get sessionId in same way as newSession.
I mean this (response.value.sessionId || response.sessionId)

Log
not needed

Additional context

const response = await sessionRequest.makeRequest(this.options);
const newSessionId = response.sessionId;
// sessionId is missing in response. It should be value.sessionId in this case
value: {
  capabilities: {...}
  sessionId:"1cb617c2-31b7-4d7c-bfb8-25f7fb9f1219"
}

[xlenz]

will do PR for this