feat: Add projectAPI support to EfServices module

Resolves #50 (closed)

This MR adds the following:

• Project and InterestGroup models
• Bot stubbing support to the EfUser model
• ProjectAPI support
• ProjectService to fetch data from caches
• Precaches for InterestGroup and Project entities through a provider for each entity type
• Testing with a mocked ProjectAPI

These changes were tested for stability through local integration with the git-eca-API. All git-eca-API tests have passed

efservices/src/main/java/org/eclipsefoundation/efservices/api/models/EfUser.java

@@ -11,11 +11,13 @@
 **********************************************************************/
 package org.eclipsefoundation.efservices.api.models;
 
+import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 
 import javax.annotation.Nullable;
 
+import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonPOJOBuilder;
 import com.google.auto.value.AutoValue;
@@ -23,6 +25,7 @@ import com.google.auto.value.AutoValue;
 /**
  * This model contains all user profile data. It is the entity served by the
  * profile-api. Used to allow access to current user profile information.
+ * Provides a method for creating a stubbed bot user.
  */
 @AutoValue
 @JsonDeserialize(builder = AutoValue_EfUser.Builder.class)
@@ -87,8 +90,39 @@ public abstract class EfUser {
     @Nullable
     public abstract String getMpcFavoritesUrl();
 
+    @Nullable
+    @JsonIgnore
+    public abstract Boolean getIsBot();
+
     public abstract Builder toBuilder();
 
+    /**
+     * Create a bot user stub when there is no real Eclipse account for the bot.
+     *
+     * @param name the Git user name that was detected to be a bot.
+     * @param mail The email of the bot.
+     * @return a stubbed Eclipse user bot object.
+     */
+    public static EfUser createBotStub(String name, String mail) {
+        return EfUser.builder()
+                .setUid(0)
+                .setName(name)
+                .setMail(mail)
+                .setEca(Eca.builder().build())
+                .setIsBot(Boolean.TRUE)
+                .setPicture("")
+                .setFirstName("")
+                .setLastName("")
+                .setPublisherAgreements(Collections.emptyMap())
+                .setTwitterHandle("")
+                .setOrg("")
+                .setJobTitle("bot")
+                .setWebsite("")
+                .setCountry(Country.builder().build())
+                .setInterests(Collections.emptyList())
+                .setWorkingGroupsInterests(Collections.emptyList()).build();
+    }
+
     public static Builder builder() {
         return new AutoValue_EfUser.Builder();
     }
@@ -145,6 +179,9 @@ public abstract class EfUser {
 
         public abstract Builder setMpcFavoritesUrl(@Nullable String url);
 
+        @JsonIgnore
+        public abstract Builder setIsBot(@Nullable Boolean isBot);
+
         public abstract EfUser build();
     }
 
@@ -157,7 +194,8 @@ public abstract class EfUser {
         public abstract boolean getCanContributeSpecProject();
 
         public static Builder builder() {
-            return new AutoValue_EfUser_Eca.Builder();
+            return new AutoValue_EfUser_Eca.Builder().setCanContributeSpecProject(Boolean.FALSE)
+                    .setSigned(Boolean.FALSE);
         }
 
         @AutoValue.Builder