Update: default version to 8u102

Fix: exclude openjdk from version checking.

@see William-Yeh#35

Add: SUSE support.

Merge branch 'turkenh-SLES_Support'

Add: `java_set_javahome` flag to set $JAVA_HOME

Adds support for generic Java releases by defining the build number i…

…n addition to the version and subversion (William-Yeh#28)

Great contribution.  Thanks!

Add: allow role users to specify `jdk_tarball_file` locally to bypass…

… the filename composition mechanism in `tasks/set-role-variables.yml`.

@see William-Yeh#25

Refactor: clean up the handling of variables for various jdk versions…

… and platforms.

Also thanks: William-Yeh#24

Fix: recover Travis CI & CircleCI links in README

     that were changed temporarily in William-Yeh#23

Merge pull request William-Yeh#22 from valentin-nasta/master

Update: default to 1.8.0_77

Update: default to 1.8.0_74 and clean up some testing code.

Credit: William-Yeh#20