Bump test engine versions

Signed-off-by: Joffrey F <joffrey@docker.com>

Jenkinsfile

@@ -5,7 +5,12 @@ def imageNamePy2
 def imageNamePy3
 def images = [:]
 
-def dockerVersions = ["17.06.2-ce", "17.12.0-ce", "18.01.0-ce"]
+def dockerVersions = [
+  "17.06.2-ce",  // Latest EE
+  "17.12.1-ce",  // Latest CE stable
+  "18.02.0-ce",  // Latest CE edge
+  "18.03.0-ce-rc1" // Latest CE RC
+]
 
 def buildImage = { name, buildargs, pyTag ->
   img = docker.image(name)
@@ -33,7 +38,7 @@ def buildImages = { ->
 }
 
 def getAPIVersion = { engineVersion ->
-  def versionMap = ['17.06': '1.30', '17.12': '1.35', '18.01': '1.35']
+  def versionMap = ['17.06': '1.30', '17.12': '1.35', '18.02': '1.36', '18.03': '1.37']
   return versionMap[engineVersion.substring(0, 5)]
 }