Changes

• Requires Java 8 as minimum
• Switch logger implementation from log4j to logback
• Add optional extension for eHealth applications
• Some code stabilization
• Update von Libraries
  • org.springframework 5.3.13.RELEASE
  • org.springframework.data.spring-data-jpa 2.6.0.RELEASE
  • org.springframework.data.spring-data-redis 2.6.0.RELEASE     
  • redis.clients 3.7.1     
  • org.hibernate:hibernate-core 5.6.2.Final
  • commons-dbcp2 2.9.0
  • log4j 2.17.0
  • logback 1.2.9
  • com.google.guava 31.0.1-jre     
  • org.apache.santuario.xmlsec 2.3.0     
  • org.apache.cxf 3.3.12
  • org.apache.struts2 2.5.28     
  • org.apache.httpcomponents.httpcore 4.5.15     
  • mysql-connector 8.0.27     
  • fasterxml:jackson 2.13.0
  • commons-io 2.11.0          
  • jodatime 2.10.13
  • org.apache.commons-commons-pool2 2.11.1
  • iaik_jce_full 5.62_moa
  • moa-spss 3.1.4