Minor test updates, tweak ram usage for bigger tests

deeplearning4j/deeplearning4j-core/src/test/java/org/deeplearning4j/regressiontest/RegressionTest100b3.java

@@ -207,7 +207,6 @@ public class RegressionTest100b3 extends BaseDL4JTest {
 
 
     @Test
-    @Disabled("AB 2019/05/23 - Failing on linux-x86_64-cuda-9.2 - see issue #7657")
     public void testYoloHouseNumber() throws Exception {
 
         File f = Resources.asFile("regression_testing/100b3/HouseNumberDetection_100b3.bin");

nd4j/nd4j-backends/nd4j-backend-impls/pom.xml

@@ -130,9 +130,6 @@
                             <OMP_NUM_THREADS>1</OMP_NUM_THREADS>
                             <LD_LIBRARY_PATH>${env.LD_LIBRARY_PATH}:${user.dir}</LD_LIBRARY_PATH>
                         </environmentVariables>
-                        <includes>
-                            <include>**/Nd4jTestSuite.java</include>
-                        </includes>
                         <!--<excludes>
                             <exclude>**/Test*.java</exclude>
                             <exclude>**/*Test.java</exclude>
@@ -142,7 +139,7 @@
                             Maximum heap size was set to 8g, as a minimum required value for tests run.
                             Depending on a build machine, default value is not always enough.
                         -->
-                        <argLine> -Djava.library.path="${nd4j.basedir}/nd4j-backends/nd4j-backend-impls/nd4j-cuda/target/classes"</argLine>
+                        <argLine>-Xmx8g</argLine>
                     </configuration>
                 </plugin>
                 <plugin>

nd4j/nd4j-backends/nd4j-tests/src/test/java/org/nd4j/linalg/specials/LongTests.java

@@ -24,6 +24,7 @@ import lombok.extern.slf4j.Slf4j;
 import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Tag;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.parallel.Isolated;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
 
@@ -47,6 +48,7 @@ import static org.junit.jupiter.api.Assertions.assertNotEquals;
 
 @Slf4j
 @NativeTag
+@Isolated
 public class LongTests extends BaseNd4jTestWithBackends {
 
     DataType initialType = Nd4j.dataType();

nd4j/nd4j-backends/nd4j-tests/src/test/java/org/nd4j/linalg/workspace/CyclicWorkspaceTests.java

@@ -65,7 +65,6 @@ public class CyclicWorkspaceTests extends BaseNd4jTestWithBackends {
         }
     }
 
-    @Test
     @ParameterizedTest
     @MethodSource("org.nd4j.linalg.BaseNd4jTestWithBackends#configs")
     public void testGc(Nd4jBackend backend) {