Gerrit functions extracted into own file

Change-Id: I8589be350238b5886dd44d060266c2c599c9386b
diff --git a/src/com/mirantis/mk/Common.groovy b/src/com/mirantis/mk/Common.groovy
index 02fcada..881f706 100644
--- a/src/com/mirantis/mk/Common.groovy
+++ b/src/com/mirantis/mk/Common.groovy
@@ -415,69 +415,4 @@
             }
         }
     }
-}
-
-/**
- * Execute git clone and checkout stage from gerrit review
- *
- * @param config LinkedHashMap
- *        config includes next parameters:
- *          - credentialsId, id of user which should make checkout
- *          - withMerge, prevent detached mode in repo
- *          - withWipeOut, wipe repository and force clone
- *
- * Usage example:
- * //anonymous gerrit checkout
- * def gitFunc = new com.mirantis.mcp.Git()
- * gitFunc.gerritPatchsetCheckout([
- *   withMerge : true
- * ])
- *
- * def gitFunc = new com.mirantis.mcp.Git()
- * gitFunc.gerritPatchsetCheckout([
- *   credentialsId : 'mcp-ci-gerrit',
- *   withMerge : true
- * ])
- */
-def gerritPatchsetCheckout(LinkedHashMap config) {
-    def merge = config.get('withMerge', false)
-    def wipe = config.get('withWipeOut', false)
-    def credentials = config.get('credentialsId','')
-
-    // default parameters
-    def scmExtensions = [
-        [$class: 'CleanCheckout'],
-        [$class: 'BuildChooserSetting', buildChooser: [$class: 'GerritTriggerBuildChooser']]
-    ]
-    def scmUserRemoteConfigs = [
-        name: 'gerrit',
-        refspec: "${GERRIT_REFSPEC}"
-    ]
-
-    if (credentials == '') {
-        // then try to checkout in anonymous mode
-        scmUserRemoteConfigs.put('url',"https://${GERRIT_HOST}/${GERRIT_PROJECT}")
-    } else {
-        // else use ssh checkout
-        scmUserRemoteConfigs.put('url',"ssh://${GERRIT_NAME}@${GERRIT_HOST}:${GERRIT_PORT}/${GERRIT_PROJECT}.git")
-        scmUserRemoteConfigs.put('credentialsId',credentials)
-    }
-
-    // if we need to "merge" code from patchset to GERRIT_BRANCH branch
-    if (merge) {
-        scmExtensions.add([$class: 'LocalBranch', localBranch: "${GERRIT_BRANCH}"])
-    }
-    // we need wipe workspace before checkout
-    if (wipe) {
-        scmExtensions.add([$class: 'WipeWorkspace'])
-    }
-
-    checkout(
-        scm: [
-            $class: 'GitSCM',
-            branches: [[name: "${GERRIT_BRANCH}"]],
-            extensions: scmExtensions,
-            userRemoteConfigs: [scmUserRemoteConfigs]
-        ]
-    )
-}
+}
\ No newline at end of file