More sonar fixes in policy/common

Note: this does not increase code coverage, but should fix other
code issues.

Resolved cyclomatic complexity issue in ParameterValidationResult.
Refactored duplicate code in GroupValidationResult.
Removed IOException from NetworkUtil "throws".
Replaced null/empty string tests with StringUtils.isBlank().
Added @FunctionalInterface where needed.
Replaced anonymous classes with lambda expressions.
Replaced duplicate strings with a constant.
Added private constructors for utility classes.
Removed sleep() from tests.
Removed unused parameter from method call.
Made some protected methods private.
Compute integrity monitor's state-transition table once.
Use for-loop instead of iterator.
Moved constructors.
Fixed some checkstyle issues (tabs => spaces, trailing spaces).

Change-Id: I9a962ca45c4ff3f212c6014da799d06f07b232ef
Issue-ID: POLICY-1791
Signed-off-by: Jim Hahn <jrh3@att.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/common-parameters/src/test/java/org/onap/policy/common/parameters/testclasses/TestParametersL00.java b/common-parameters/src/test/java/org/onap/policy/common/parameters/testclasses/TestParametersL00.java
index ea5ae853..2b41d0fb 100644
--- a/common-parameters/src/test/java/org/onap/policy/common/parameters/testclasses/TestParametersL00.java
+++ b/common-parameters/src/test/java/org/onap/policy/common/parameters/testclasses/TestParametersL00.java
@@ -24,6 +24,7 @@ package org.onap.policy.common.parameters.testclasses;
 import java.util.LinkedHashMap;
 import java.util.Map;
 import java.util.Map.Entry;
+import org.apache.commons.lang3.StringUtils;
 import org.onap.policy.common.parameters.GroupValidationResult;
 import org.onap.policy.common.parameters.ParameterConstants;
 import org.onap.policy.common.parameters.ParameterGroupImpl;
@@ -163,11 +164,11 @@ public class TestParametersL00 extends ParameterGroupImpl {
     public GroupValidationResult validate() {
         GroupValidationResult validationResult = super.validate();
 
-        if (getName() == null || getName().trim().length() == 0) {
+        if (StringUtils.isBlank(getName())) {
             validationResult.setResult("name", ValidationStatus.INVALID, "name must be a non-blank string");
         }
 
-        if (l00StringField == null || l00StringField.trim().length() == 0) {
+        if (StringUtils.isBlank(l00StringField)) {
             validationResult.setResult(L00_STRING_FIELD, ValidationStatus.INVALID,
                             "l00StringField must be a non-blank string");
         } else if (l00StringField.equals(L00_STRING_FIELD)) {