Migrate Java of IHS 8 from 1.6 to 1.8

1. Can't directly migrate to Java 1.8 before fixpack 8.5.5.11

2. Must new install IHS 8.5.5.11 to have Java 1.8

4. To install IHS 8.5.5.11 with Java 1.8 using imcl command, you must add "-properties wasjava=java8" option

5. Will be able to migrate to 1.8 directly by applying fixpack 8.5.5.12

6. The incorrect core runtime  information in the versionInfo output will be fixed in fixpack 8.5.5.12 (PI77304)

Installing Java SDK 8.0 on WAS 8.5.5.x                                
https://www.ibm.com/developerworks/community/blogs/aimsupport/entry/Installing_Java_SDK_8.0_on_WAS_8.5.5.x?lang=en                            

7. If you install IHS 5.5.5.11 (new install) using IM GUI (wizard mode), it will install Java 8 default (same as WAS). It is not necessary to add the option "-properties wasjava=java8" like imcl command line.