ci: dummy module now depends only on relevant subprojects

Before this commit dummy module in project was dependant on both
versions of Scala and all supported versions of Spark, which is
incorrect.

dummy/pom.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <parent>
         <artifactId>kotlin-spark-api-parent</artifactId>
         <groupId>org.jetbrains.kotlinx.spark</groupId>
@@ -10,22 +11,32 @@
     <name>Kotlin API for Apache Spark: not-needed</name>
     <description>Module to workaround https://issues.sonatype.org/browse/NEXUS-9138</description>
     <artifactId>dummy</artifactId>
-    <dependencies>
-        <dependency>
-            <groupId>org.jetbrains.kotlinx.spark</groupId>
-            <artifactId>examples-2.4_2.11</artifactId>
-            <version>${project.parent.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>org.jetbrains.kotlinx.spark</groupId>
-            <artifactId>examples-2.4_2.12</artifactId>
-            <version>${project.parent.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>org.jetbrains.kotlinx.spark</groupId>
-            <artifactId>examples-3.0_2.12</artifactId>
-            <version>${project.parent.version}</version>
-        </dependency>
-    </dependencies>
+    <profiles>
+        <profile>
+            <id>scala-2.11</id>
+            <dependencies>
+                <dependency>
+                    <groupId>org.jetbrains.kotlinx.spark</groupId>
+                    <artifactId>examples-2.4_2.11</artifactId>
+                    <version>${project.parent.version}</version>
+                </dependency>
+            </dependencies>
+        </profile>
+        <profile>
+            <id>scala-2.12</id>
+            <dependencies>
+                <dependency>
+                    <groupId>org.jetbrains.kotlinx.spark</groupId>
+                    <artifactId>examples-2.4_2.12</artifactId>
+                    <version>${project.parent.version}</version>
+                </dependency>
+                <dependency>
+                    <groupId>org.jetbrains.kotlinx.spark</groupId>
+                    <artifactId>examples-3.0_2.12</artifactId>
+                    <version>${project.parent.version}</version>
+                </dependency>
+            </dependencies>
+        </profile>
+    </profiles>
 
 </project>