upgrade: Bump Gradle to version 6.8.3

- Upgrade the Gradle Wrapper
- Bump spotbugs and spotbugs Gradle plugin to the latest versions

[#181598917]

build.gradle

@@ -18,8 +18,7 @@ buildscript {
         mariadbJdbcVersion = '2.7.4' // When using a MariaDB with a driver of version 2.4.0 or greater, FlyWay 5 does not know how to handle the driver reporting itself as "MariaDB" and will throw an exception causing CredHub to be unable to start. Do not upgrade until this issue is resolved. See #174776586.
         passayVersion = '1.6.1'
         postgresqlJdbcVersion = '42.3.3'
-        spotBugsToolVersion = '3.1.9'
-        spotBugsGradlePluginVersion = '1.6.9'
+        spotBugsToolVersion = '4.6.0'
         springRestDocsVersion = '2.0.6.RELEASE'
         springBootVersion = '2.4.13' // Springboot 2.5.5 requires Gradle 6.8.x, 6.9.x, or 7.x
         springSecurityOauth2Version = '2.5.1.RELEASE'
@@ -44,6 +43,7 @@ buildscript {
 
 plugins {
     id 'com.github.ben-manes.versions' version '0.42.0'
+    id 'com.github.spotbugs'
 }
 
 apply plugin: DependenciesGraphPlugin

buildSrc/build.gradle

@@ -3,5 +3,5 @@ repositories {
 }
 
 dependencies {
-    compile "gradle.plugin.com.github.spotbugs:spotbugs-gradle-plugin:1.6.9"
+    compile "gradle.plugin.com.github.spotbugs:spotbugs-gradle-plugin:2.0.0"
 }

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.6-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.8.3-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

gradlew

@@ -125,8 +125,8 @@ if $darwin; then
     GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
 fi
 
-# For Cygwin, switch paths to Windows format before running java
-if $cygwin ; then
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
     APP_HOME=`cygpath --path --mixed "$APP_HOME"`
     CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
     JAVACMD=`cygpath --unix "$JAVACMD"`

spotbugs.gradle

@@ -1,5 +1,3 @@
-apply plugin: "com.github.spotbugs"
-
 spotbugs {
     toolVersion = "$spotBugsToolVersion"
     excludeFilter = file("$rootProject.projectDir/config/findbugs/exclude-filter.xml")