fix(gradle): tests not executed be cause of issues with Gradle 4

Author: arnobl

build.gradle

@@ -53,10 +53,6 @@ dependencies {
     testCompile 'org.mockito:mockito-core:1.8.5'
 }
 
-task wrapper(type: Wrapper) {
-    gradleVersion = '4.10.2' //version required
-}
-
 task sourcesJar(type: Jar) {
     classifier = 'sources'
     from sourceSets.main.allSource

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists