Add unit tests for com.xxl.job.core.biz.impl.ExecutorBizImpl

These tests were written usnig Diffblue cover

xxl-job-core/pom.xml

@@ -44,6 +44,34 @@
 			<scope>provided</scope>
 		</dependency>
 
+		<dependency>
+			<groupId>org.powermock</groupId>
+			<artifactId>powermock-api-mockito</artifactId>
+			<version>1.6.5</version>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.powermock</groupId>
+			<artifactId>powermock-module-junit4</artifactId>
+			<version>1.6.5</version>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.mockito</groupId>
+			<artifactId>mockito-all</artifactId>
+			<version>1.10.19</version>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>com.diffblue</groupId>
+			<artifactId>deeptestutils</artifactId>
+			<version>1.9.0</version>
+			<scope>test</scope>
+		</dependency>
+
 	</dependencies>
 
 </project>
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