Spring Boot 2.0 Compatibility

Previously, the library utilized an API from Spring Boot that arrived in
2.1.0.  Support for Spring Boot 2.0 compatibility was requested and we can
trivially add that support even though Boot 2.0 is EOL.  This change updates
the use of the API to be Boot 2.0 compatible.

Signed-off-by: Ben Hale <bhale@vmware.com>

src/main/java/org/springframework/cloud/bindings/boot/BindingFlattenedEnvironmentPostProcessor.java

@@ -64,7 +64,7 @@ public final class BindingFlattenedEnvironmentPostProcessor implements Applicati
 
     @Override
     public void onApplicationEvent(ApplicationPreparedEvent event) {
-        this.log.switchTo(getClass());
+        this.log.replayTo(getClass());
     }
 
     @Override

src/main/java/org/springframework/cloud/bindings/boot/BindingSpecificEnvironmentPostProcessor.java

@@ -82,7 +82,7 @@ public final class BindingSpecificEnvironmentPostProcessor implements Applicatio
 
     @Override
     public void onApplicationEvent(ApplicationPreparedEvent event) {
-        LOG.switchTo(getClass());
+        LOG.replayTo(getClass());
     }
 
     @Override

src/main/java/org/springframework/cloud/bindings/boot/SpringSecurityOAuth2BindingsPropertiesProcessor.java

@@ -68,6 +68,6 @@ public final class SpringSecurityOAuth2BindingsPropertiesProcessor implements Bi
 
     @Override
     public void onApplicationEvent(ApplicationPreparedEvent event) {
-        LOG.switchTo(getClass());
+        LOG.replayTo(getClass());
     }
 }

src/main/java/org/springframework/cloud/bindings/boot/VaultBindingsPropertiesProcessor.java

@@ -116,6 +116,6 @@ public final class VaultBindingsPropertiesProcessor implements BindingsPropertie
 
     @Override
     public void onApplicationEvent(ApplicationPreparedEvent event) {
-        LOG.switchTo(getClass());
+        LOG.replayTo(getClass());
     }
 }