ci_: add proxy test creds

_assets/ci/Jenkinsfile.tests-rpc

@@ -1,5 +1,8 @@
 #!/usr/bin/env groovy
-library '[email protected]'
+library '[email protected]'
+
+def releaseStatus = utils.isReleaseBuild()
+def buildType = creds.develOrRelease()
 
 pipeline {
   agent { label 'linux && x86_64 && nix-2.19' }
@@ -15,6 +18,11 @@ pipeline {
       defaultValue: true,
       description: 'Should the job report test coverage to Codecov?'
     )
+    booleanParam(
+      name: 'RELEASE',
+      description: 'Decides whether release credentials are used.',
+      defaultValue: params.RELEASE ?: false
+    )
   }
 
   options {
@@ -35,11 +43,20 @@ pipeline {
     PKG_URL = "${currentBuild.absoluteUrl}/consoleText"
 
     /* Hack-fix for params not being set in env on first job run. */
-    BRANCH =                           "${params.BRANCH}"
+    BRANCH =                          "${params.BRANCH}"
     FUNCTIONAL_TESTS_REPORT_CODECOV = "${params.FUNCTIONAL_TESTS_REPORT_CODECOV}"
   }
 
   stages {
+    stage('Print Environment') {
+      steps { script {
+        echo "Release Build: ${params.RELEASE}"
+
+        echo "Release Build Status: ${releaseStatus}"
+
+        echo "Build Type: ${buildType}"
+      } }
+    }
     stage('RPC Tests') {
       steps { script {
         withCredentials([