java-sdk-7.0.0

• Fixed: Integration tests don't expect wrong entries
• Changed: Add java and os version to user agent
• Changed: Update okhttp from 2.5.0 to 3.2.0OkHTTP3 Changelog for 3.2.0
• Changed: Update retrofit from 1.9.0 to 2.0.1Retrofit Changelog for 2.0.0
• Changed: Update rxjava from 1.0.14 to 1.1.2rxjava Changelog for 1.1.2
• New: Add gson 2.6.2 (was bundled with retrofit before)
• New: Add converter-gson 2.0.1 (was bundled with retrofit before)
• New: Add adapter-rxjava 2.0.1 (was bundled with retrofit before)
• New: Use Call.Factory for http client customization