Openldap helmchart-based KNF and NS packages

Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>

openldap_knf/openldap_vnfd.yaml

+vnfd-catalog:
+  schema-version: '3.0'
+  vnfd:
+  - id: openldap_knf
+    name: openldap_knf
+    short-name: openldap_knf
+    description: KNF with single KDU using a helm-chart for openldap version 1.2.1
+    vendor: Telefonica
+    version: '1.0'
+    mgmt-interface:
+      cp: mgmt
+    connection-point:
+    - name: mgmt
+    k8s-cluster:
+      nets:
+      - id: mgmtnet
+        external-connection-point-ref: mgmt
+    kdu:
+    - name: ldap
+      helm-chart: stable/openldap:1.2.1
+

openldap_ns/README.md

+# SIMPLE OPEN-LDAP CHART
+
+Descriptors that installs an openldap version 1.2.1 chart in a K8s cluster
+
+There is one VNF (openldap\_vnf) with only one KDU.
+
+There is one NS that connects the VNF to a mgmt network
+
+## Onboarding and instantiation
+
+```bash
+osm nfpkg-create openldap_knf.tar.gz
+osm nspkg-create openldap_ns.tar.gz
+osm ns-create --ns_name ldap --nsd_name openldap_ns --vim_account <VIM_ACCOUNT_NAME>|<VIM_ACCOUNT_ID> --ssh_keys ${HOME}/.ssh/id_rsa.pub
+```
+
+### Instantiation option
+
+Some parameters could be passed during the instantiation.
+
+* replicaCount: Number of Open LDAP replicas that will be created
+
+```bash
+osm ns-create --ns_name ldap --nsd_name openldap_ns --vim_account <VIM_ACCOUNT_NAME>|<VIM_ACCOUNT_ID> --config '{additionalParamsForVnf: [{"member-vnf-index": "openldap", "additionalParams": {"replicaCount": "2"}}]}'
+```
+

openldap_ns/openldap_nsd.yaml

+nsd-catalog:
+    nsd:
+    -   id: openldap_ns
+        name: openldap_ns
+        short-name: openldap_ns
+        description: NS consisting of a single KNF openldap_knf connected to mgmt network
+        vendor: OSM
+        version: '1.0'
+        logo: osm.png
+        constituent-vnfd:
+        -   member-vnf-index: openldap
+            vnfd-id-ref: openldap_knf
+        vld:
+        -   id: mgmtnet
+            name: mgmtnet
+            type: ELAN
+            mgmt-network: 'true'
+            vnfd-connection-point-ref:
+            -   member-vnf-index-ref: openldap
+                vnfd-id-ref: openldap_knf
+                vnfd-connection-point-ref: mgmt
+