Renamed modules

application/module-certificate/.gitignore

...ication/module-certificate/.mvn/wrapper/maven-wrapper.jar

.../module-certificate/.mvn/wrapper/maven-wrapper.properties

application/module-certificate/mvnw

application/module-certificate/mvnw.cmd

application/module-certificate/pom.xml

...useri/modulecertificate/ModuleCertificateApplication.java

...ule-certificate/src/main/resources/application.properties

.../modulecertificate/ModuleCertificateApplicationTests.java

application/module-language-school/.gitignore

...ion/module-language-school/.mvn/wrapper/maven-wrapper.jar

...ule-language-school/.mvn/wrapper/maven-wrapper.properties

application/module-language-school/mvnw

application/module-language-school/mvnw.cmd

application/module-language-school/pom.xml

...modulelanguageschool/ModuleLanguageSchoolApplication.java

...language-school/src/main/resources/application.properties

...elanguageschool/ModuleLanguageSchoolApplicationTests.java

application/module-mail/.gitignore

application/module-mail/.mvn/wrapper/maven-wrapper.jar