Describe the bug Application fails to startup because the "spring.config.import does not recognize list as input" during the "postProcessEnvironment" validation checks. Issue started after upgrade from 2020.0.1 to 2020.0.2

Sample Create a simple springboot app using gradle with spring cloud dependency.

build.gradle

dependencies {
implementation('org.springframework.boot:spring-boot-starter-web')
implementation('org.springframework.cloud:spring-cloud-starter-config')
}
dependencyManagement {
    imports {
        mavenBom "org.springframework.cloud:spring-cloud-dependencies:2020.0.2"
    }
}

Application.yml:

spring:
  application:
    name: my-test-app
  config:
    import:
      - optional:configserver:\<dev url>
      - optional:configserver:\<test url>
      - optional:configserver:\<prod url>

Comment From: spencergibb

Duplicates #1849