Revert SnakeYAML changes (#13335)

Revert "Replace deprecated constructor calls (#13271)"
- This reverts commit 213a4a1.

Revert "Add SnakeYAML BOM (#13256)"
- This reverts commit 696d33a.

build.gradle

@@ -68,12 +68,6 @@ ext {
                     names  : ['grails-async', 'grails-events'],
                     modules: ['gpars', 'rxjava', 'rxjava2']
             ],
-            snakeyaml       : [
-                    version: snakeyamlVersion,
-                    group  : 'org.yaml',
-                    names  : ['snakeyaml'],
-                    modules: ['']
-            ],
             spock           : [
                     version: spockVersion,
                     group  : 'org.spockframework',

gradle.properties

@@ -21,7 +21,6 @@ concurrentlinkedhashmapVersion=1.4.2
 springLoadedVersion=1.2.8.RELEASE
 jnaVersion=4.2.2
 slf4jVersion=1.7.25
-snakeyamlVersion=2.2
 directoryWatcherVersion=0.5.1
 junitVersion=4.12
 caffeineVersion=2.6.2

grails-bootstrap/build.gradle

@@ -3,7 +3,7 @@ import org.apache.tools.ant.filters.ReplaceTokens
 dependencies {
     compile ( "org.codehaus.groovy:groovy-xml:$groovyVersion" )
     compile ( "org.codehaus.groovy:groovy-templates:$groovyVersion" )
-    compile "org.yaml:snakeyaml:$snakeyamlVersion"
+    compile "org.yaml:snakeyaml:1.14"
 
     compileOnly("io.methvin:directory-watcher:0.3.0")
     compileOnly("org.fusesource.jansi:jansi:$jansiVersion")

grails-bootstrap/src/main/groovy/grails/util/Metadata.groovy

@@ -22,9 +22,7 @@ import org.grails.config.NavigableMap
 import org.grails.io.support.FileSystemResource
 import org.grails.io.support.Resource
 import org.grails.io.support.UrlResource
-import org.yaml.snakeyaml.LoaderOptions
 import org.yaml.snakeyaml.Yaml
-import org.yaml.snakeyaml.constructor.SafeConstructor
 
 import java.lang.ref.Reference
 import java.lang.ref.SoftReference
@@ -169,7 +167,7 @@ class Metadata extends NavigableMap implements ConfigMap  {
     }
 
     private Object loadYml(InputStream input) {
-        Yaml yaml = new Yaml(new SafeConstructor(new LoaderOptions()))
+        Yaml yaml = new Yaml()
         def loadedYaml = yaml.loadAll(input)
         List result = []
         for(Object yamlObject : loadedYaml) {

grails-bootstrap/src/main/groovy/org/grails/config/CodeGenConfig.groovy

@@ -22,9 +22,7 @@ import groovy.transform.CompileDynamic
 import groovy.transform.CompileStatic
 import org.codehaus.groovy.runtime.DefaultGroovyMethods
 import org.codehaus.groovy.runtime.typehandling.GroovyCastException
-import org.yaml.snakeyaml.LoaderOptions
 import org.yaml.snakeyaml.Yaml
-import org.yaml.snakeyaml.constructor.SafeConstructor
 
 
 /**
@@ -154,7 +152,7 @@ class CodeGenConfig implements Cloneable, ConfigMap {
 
     @CompileDynamic // fails with CompileStatic!
     void loadYml(InputStream input) {
-        Yaml yaml = new Yaml(new SafeConstructor(new LoaderOptions()))
+        Yaml yaml = new Yaml()
         for(Object yamlObject : yaml.loadAll(input)) {
             if(yamlObject instanceof Map) { // problem here with CompileStatic
                 mergeMap((Map)yamlObject)