Fix completion and docs in OpenShift 4.3

Signed-off-by: Anatoliy Bazko <abazko@redhat.com>

deploy/crds/org_v1_che_cr.yaml

@@ -95,8 +95,6 @@ spec:
     externalIdentityProvider: false
     # retrieved from respective route/ingress unless explicitly specified in CR (when ExternalKeycloak is true)
     identityProviderURL: ''
-    # password for keycloak database user. Auto generated if left blank
-    keycloakPostgresPassword: ''
     # desired admin username of Keycloak admin user (applicable only when externalIdentityProvider is false)
     identityProviderAdminUserName: ''
     # desired password of Keycloak admin user (applicable only when externalIdentityProvider is false)

olm/eclipse-che-preview-openshift/deploy/olm-catalog/eclipse-che-preview-openshift/7.13.1/eclipse-che-preview-openshift.crd.yaml

@@ -22,8 +22,10 @@ spec:
   scope: Namespaced
   subresources:
     status: {}
+  preserveUnknownFields: false
   validation:
     openAPIV3Schema:
+      type: object
       properties:
         apiVersion:
           description: 'APIVersion defines the versioned schema of this representation

olm/eclipse-che-preview-openshift/deploy/olm-catalog/eclipse-che-preview-openshift/7.13.1/eclipse-che-preview-openshift.crd.yaml.diff

@@ -0,0 +1,13 @@
+--- /home/tolusha/gocode/src/github.com/eclipse/che-operator/olm/eclipse-che-preview-openshift/deploy/olm-catalog/eclipse-che-preview-openshift/7.12.2/eclipse-che-preview-openshift.crd.yaml	2020-05-15 13:45:57.344217424 +0300
++++ /home/tolusha/gocode/src/github.com/eclipse/che-operator/olm/eclipse-che-preview-openshift/deploy/olm-catalog/eclipse-che-preview-openshift/7.13.1/eclipse-che-preview-openshift.crd.yaml	2020-05-21 08:38:59.428474725 +0300
+@@ -22,8 +22,10 @@
+   scope: Namespaced
+   subresources:
+     status: {}
++  preserveUnknownFields: false
+   validation:
+     openAPIV3Schema:
++      type: object
+       properties:
+         apiVersion:
+           description: 'APIVersion defines the versioned schema of this representation