update CHANGELOG for the version 7.0.2

Author: Helene

docs/CHANGELOG.md

@@ -1,3 +1,11 @@
+# Version 7.0.2 (08/02/2021)
+Changed the Dockerfile parent image to the registry.access.redhat.com/ubi8/ubi
+Changed the sleep time = 60 seconds for re-attempting to get the MetaData from the pmcollector in case no data have been returned during the bridge start instead of stopping the process directly
+
+Tested with Grafana version 7.5.1 and 8.0.3
+
+
+
 # Version 7.0.1 (07/21/2021)
 Added support for [IBM Spectrum Scale Container Native Storage Access 5.1.1.1](https://www.ibm.com/docs/en/scalecontainernative?topic=spectrum-scale-container-native-storage-access-5111)
 - updated example deployment yaml files according the API key authentication changes introduced to the IBM Spectrum Scale Performance monitoring tool

docs/SUPPORT_MATRIX.md

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 The following matrix gives a quick overview of the supported software for the IBM Spectrum Scale bridge for Grafana packages by version number:
+# Version 7.0.2 (08/02/2021)
+- Python 3.6
+- CherryPy 18.6.1
+- IBM Spectrum Scale system must run 5.1.1 and above or
+- IBM Spectrum Scale Container Native Storage Access(CNSA) devices having minReleaseLevel 5.1.1.1
+- Grafana 8.0.0 and above
+
 # Version 7.0.1 (07/21/2021)
 - Python 3.6
 - CherryPy 18.6.0