Fix libs:ssl-config project setup (#39074)

The build script file for the `:libs:elasticsearch-ssl-config` and
`:libs:ssl-config-tests` projects was incorrectly named `eclipse.build.gradle`
 while the expected name was `eclipse-build.gradle`.
In addition, this also adds a missing snippet in the `build.gradle` conf file,
that fixes the project setup for Eclipse users.

libs/ssl-config/build.gradle

@@ -34,9 +34,23 @@ dependencies {
     testCompile "org.hamcrest:hamcrest-all:${versions.hamcrest}"
 }
 
+if (isEclipse) {
+  // in eclipse the project is under a fake root, we need to change around the source sets
+  sourceSets {
+    if (project.path == ":libs:ssl-config") {
+      main.java.srcDirs = ['java']
+      main.resources.srcDirs = ['resources']
+    } else {
+      test.java.srcDirs = ['java']
+      test.resources.srcDirs = ['resources']
+    }
+  }
+}
+
 forbiddenApisMain {
     replaceSignatureFiles 'jdk-signatures'
 }
+
 forbiddenPatterns {
     exclude '**/*.key'
     exclude '**/*.pem'

libs/ssl-config/src/main/eclipse-build.gradle

@@ -1,2 +1,2 @@
-// this is just shell gradle file for eclipse to have separate projects for geo src and tests
+// this is just shell gradle file for eclipse to have separate projects for ssl-config src and tests
 apply from: '../../build.gradle'

libs/ssl-config/src/test/eclipse-build.gradle

@@ -1,5 +1,5 @@
-// this is just shell gradle file for eclipse to have separate projects for geo src and tests
+// this is just shell gradle file for eclipse to have separate projects for ssl-config src and tests
 apply from: '../../build.gradle'
 dependencies {
   testCompile project(':libs:elasticsearch-ssl-config')
-} 
+}