Add correct UL-method hasTypeParameters realization (#KT-30970 Fixed)

Incorrect realization is breaking-down of IDEA generic-type inference algorithm that leads to SOE.

compiler/light-classes/src/org/jetbrains/kotlin/asJava/elements/KtLightMethodImpl.kt

@@ -137,6 +137,8 @@ open class KtLightMethodImpl protected constructor(
     override fun getTypeParameters(): Array<PsiTypeParameter> =
             typeParameterList?.typeParameters ?: PsiTypeParameter.EMPTY_ARRAY
 
+    override fun hasTypeParameters() = typeParameters.isNotEmpty()
+
     override fun getSignature(substitutor: PsiSubstitutor): MethodSignature {
         if (substitutor == PsiSubstitutor.EMPTY) {
             return clsDelegate.getSignature(substitutor)
@@ -218,8 +220,6 @@ open class KtLightMethodImpl protected constructor(
 
     override fun getThrowsList() = clsDelegate.throwsList
 
-    override fun hasTypeParameters() = clsDelegate.hasTypeParameters()
-
     override fun isVarArgs() = (dummyDelegate ?: clsDelegate).isVarArgs
 
     override fun isConstructor() = dummyDelegate?.isConstructor ?: clsDelegate.isConstructor