Added NS Performance Management openAPI - reference to SOL005 as-is

src/SOL011/NSPerformanceManagement/NSPerformanceManagement.yaml

+swagger: "2.0"
+
+info:
+  version: "1.1.0-impl:etsi.org:ETSI_NFV_OpenAPI:1"
+  title: "SOL011 - NS Performance Management Interface"
+  description: >
+    SOL011 - NS Performance Management Interface
+    IMPORTANT: Please note that this file might be not aligned to the current
+    version of the ETSI Group Specification it refers to and has not been
+    approved by the ETSI NFV ISG. In case of discrepancies the published ETSI
+    Group Specification takes precedence.
+    Please report bugs to https://forge.etsi.org/bugzilla/buglist.cgi?component=Nfv-Openapis
+  license:
+    name: "ETSI Forge copyright notice"
+    url: https://forge.etsi.org/etsi-forge-copyright-notice.txt
+  contact:
+    name: "NFV-SOL WG"
+
+externalDocs:
+  description: ETSI GS NFV-SOL 011 V3.3.1
+  url: https://www.etsi.org/deliver/etsi_gs/NFV-SOL/001_099/011/03.03.01_60/gs_NFV-SOL011v030301p.pdf
+
+basePath: /nspm/v1
+
+schemes:
+  - http
+  - https
+
+consumes:
+  - application/json
+
+produces:
+  - application/json
+
+paths:
+  "/api_versions":
+    $ref: 'https://forge.etsi.org/jenkins/job/NFV%20-%20Network%20Functions%20Virtualisation/job/sol005-master/20/artifact/build/SOL005-NSPerformanceManagement-API.yaml#/paths/~1api-versions'
+  "/pm_jobs":
+    $ref: 'https://forge.etsi.org/jenkins/job/NFV%20-%20Network%20Functions%20Virtualisation/job/sol005-master/20/artifact/build/SOL005-NSPerformanceManagement-API.yaml#/paths/~1pm_jobs'
+  "/pm_jobs/{pmJobId}":
+    $ref: 'https://forge.etsi.org/jenkins/job/NFV%20-%20Network%20Functions%20Virtualisation/job/sol005-master/20/artifact/build/SOL005-NSPerformanceManagement-API.yaml#/paths/~1pm_jobs~1{pmJobId}'
+  "/thresholds":
+    $ref: 'https://forge.etsi.org/jenkins/job/NFV%20-%20Network%20Functions%20Virtualisation/job/sol005-master/20/artifact/build/SOL005-NSPerformanceManagement-API.yaml#/paths/~1thresholds'
+  "/thresholds/{thresholdId}":
+    $ref: 'https://forge.etsi.org/jenkins/job/NFV%20-%20Network%20Functions%20Virtualisation/job/sol005-master/20/artifact/build/SOL005-NSPerformanceManagement-API.yaml#/paths/~1thresholds~1{thresholdId}'
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