Revisit the terms and seo for MP5 and Jakarta EE 9

[gkwan-ibm]

The guides were migrated to use MP5 and Jakarta EE 9. Need to fix the README, seo, cloud-hosted landing pages to use the right terms of MP5 and Jakarta EE 9, e.g.

• not jaxrs
• Eclipse MicroProfile -> MicroProfile
• more ...

[gkwan-ibm]

for jaxrs

• guide-arquillian-managed only need to update the output at test section
• guide-reactive-rest-client and guide-microshed-testing are pending to update to EE9

[gkwan-ibm]

for Eclipse MicroProfile, need to fix the following

• guide-microprofile-opentracing-jaeger
• guide-microprofile-graphql
• guide-microprofile-fallback
• guide-microprofile-rest-client
• guide-microprofile-metrics
• guide-microprofile-config
• guide-kubernetes-microprofile-config
• guide-microprofile-jwt
• guide-microprofile-istio-retry-fallback
• guide-kubernetes-microprofile-health
• guide-microprofile-health
• guide-mongodb-intro

following guides pending EE9 update:

• guide-microprofile-opentracing
• guide-microprofile-reactive-messaging-rest-integration
• guide-microprofile-reactive-messaging
• guide-reactive-service-testing
• guide-microprofile-rest-client-async