Merge pull request Netflix#1060 from qiangdavidliu/master

address dangling PR comments for PRs Netflix#976 and Netflix#1003

Merge pull request Netflix#1052 from qiangdavidliu/master

fix for issue Netflix#1051

Merge pull request Netflix#1044 from qiangdavidliu/v1.7.x

Verify is scheduler is active before submit

Merge pull request Netflix#1033 from qiangdavidliu/NPE_fix

fix potential NPE for issue Netflix#1014

Merge pull request Netflix#969 from dtrebbien/misc-fixes

Misc. fixes

Merge pull request Netflix#1009 from qiangdavidliu/master

Add default impl to two interface methods introduced recently

Merge pull request Netflix#997 from qiangdavidliu/master

 Add ability to fail fast in DiscoveryClient construction if an initial registration attempt fails

Merge pull request Netflix#994 from qiangdavidliu/master

Fix a race condition in the server remoteRegionRegistry

Merge pull request Netflix#989 from qiangdavidliu/master

Add a config to control whether explicit unregister should happen on client shutdown

reset idea java version to 1.7