Move Airship Seaworthy pipeline to the folder.

It is more clear when all pipelines are in their directories.

Change-Id: I6d1098b8c478214b378fc34334f93355e623cb87

doc/source/seaworthy.rst

@@ -15,7 +15,7 @@ Airship Seaworthy pipeline automates deployment flow documented in
 `Site Authoring and Deployment Guide <https://airship-treasuremap.readthedocs.io/en/latest/authoring_and_deployment.html>`__.
 
 The pipeline is implemented as Jenkins Pipeline (Groovy), see code for the pipeline at
-`Jenkinsfile <https://opendev.org/airship/treasuremap/src/branch/master/tools/gate/Jenkinsfile>`__.
+`Jenkinsfile <https://opendev.org/airship/treasuremap/src/branch/master/tools/gate/seaworthy/Jenkinsfile>`__.
 
 Versions
 --------

tools/gate/seaworthy/seed.groovy

@@ -1,5 +1,5 @@
 
-pipelineJob('seaworthy') {
+pipelineJob('Seaworthy') {
 
     displayName('Airship Seaworthy')
     description('Bare-metal continuous deployment pipeline')
@@ -78,7 +78,7 @@ pipelineJob('seaworthy') {
 
         definition {
             cps {
-                script(readFileFromWorkspace("tools/gate/Jenkinsfile"))
+                script(readFileFromWorkspace("tools/gate/seaworthy/Jenkinsfile"))
                 sandbox()
             }
         }