add rule EC1369

ecocode-rules-specifications/src/main/rules/EC1369/EC1369.json

@@ -0,0 +1,15 @@
+{
+  "title": "Performance: orElseGet instead of orElse",
+  "type": "CODE_SMELL",
+  "status": "ready",
+  "remediation": {
+    "func": "Constant\/Issue",
+    "constantCost": "1min"
+  },
+  "tags": [
+    "ecocode",
+    "eco-design",
+    "performance"
+  ],
+  "defaultSeverity": "Minor"
+}

ecocode-rules-specifications/src/main/rules/EC1369/java/EC1369.asciidoc

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+Parameter of orElse() is evaluated, even when having a non-empty Optional.
+
+Supplier method of orElseGet passed as an argument is only executed when an Optional value isn’t present.
+
+Therefore, using orElseGet() will save computing time.
+
+## Noncompliant Code Example
+
+```java
+Optional.of("ecoCode").orElse(getUnpredictedMethod());
+```
+
+## Compliant Code Example
+
+```java
+Optional.of("ecoCode").orElseGet(() -> getUnpredictedMethod());
+```
+
+```java
+randomClass.orElse(getUnpredictedMethod());
+```