[Integrated] RFR: Implement shared caching for rest requests

[Robin Westberg]

Changeset: f806af12
Author:    Robin Westberg <rwestberg at openjdk.org>
Date:      2020-02-25 13:20:01 +0000
URL:       https://git.openjdk.java.net/skara/commit/f806af12

Implement shared caching for rest requests

Reviewed-by: ehelin

! forge/src/main/java/org/openjdk/skara/forge/github/GitHubApplication.java
! forge/src/main/java/org/openjdk/skara/forge/github/GitHubHost.java
! forge/src/main/java/org/openjdk/skara/forge/github/GitHubRepository.java
! forge/src/main/java/org/openjdk/skara/forge/gitlab/GitLabHost.java
! forge/src/main/java/org/openjdk/skara/forge/gitlab/GitLabRepository.java
! issuetracker/src/main/java/org/openjdk/skara/issuetracker/jira/JiraHost.java
! issuetracker/src/main/java/org/openjdk/skara/issuetracker/jira/JiraVault.java
! network/src/main/java/org/openjdk/skara/network/RestRequest.java
+ network/src/main/java/org/openjdk/skara/network/RestRequestCache.java
! network/src/test/java/org/openjdk/skara/network/RestRequestTests.java