Add ability to use project models and classes in Groovy Migration

[yanchevsky]

We cannot use any classes from dependencies and compiled classes.
For example:

[ERROR] realm =    plugin>org.javalite:db-migrator-maven-plugin:3.0-SNAPSHOT
[ERROR] strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
[ERROR] urls[0] = file:/d:/Work/MavenRepository/org/javalite/db-migrator-maven-plugin/3.0-SNAPSHOT/db-migrator-maven-plugin-3.0-SNAPSHOT.jar
[ERROR] urls[1] = file:/d:/Work/MavenRepository/org/mariadb/jdbc/mariadb-java-client/2.2.3/mariadb-java-client-2.2.3.jar
[ERROR] urls[2] = file:/d:/Work/MavenRepository/org/codehaus/plexus/plexus-utils/3.2.1/plexus-utils-3.2.1.jar
[ERROR] urls[3] = file:/d:/Work/MavenRepository/org/slf4j/slf4j-simple/1.7.30/slf4j-simple-1.7.30.jar
[ERROR] urls[4] = file:/d:/Work/MavenRepository/org/javalite/javalite-common/3.0-SNAPSHOT/javalite-common-3.0-SNAPSHOT.jar
[ERROR] urls[5] = file:/d:/Work/MavenRepository/org/dom4j/dom4j/2.1.3/dom4j-2.1.3.jar
[ERROR] urls[6] = file:/d:/Work/MavenRepository/jaxen/jaxen/1.2.0/jaxen-1.2.0.jar
[ERROR] urls[7] = file:/d:/Work/MavenRepository/com/fasterxml/jackson/core/jackson-databind/2.11.3/jackson-databind-2.11.3.jar
[ERROR] urls[8] = file:/d:/Work/MavenRepository/com/fasterxml/jackson/core/jackson-annotations/2.11.3/jackson-annotations-2.11.3.jar
[ERROR] urls[9] = file:/d:/Work/MavenRepository/com/fasterxml/jackson/core/jackson-core/2.11.3/jackson-core-2.11.3.jar
[ERROR] urls[10] = file:/d:/Work/MavenRepository/org/apache/logging/log4j/log4j-slf4j-impl/2.13.3/log4j-slf4j-impl-2.13.3.jar
[ERROR] urls[11] = file:/d:/Work/MavenRepository/org/apache/logging/log4j/log4j-core/2.13.3/log4j-core-2.13.3.jar
[ERROR] urls[12] = file:/d:/Work/MavenRepository/org/apache/logging/log4j/log4j-api/2.13.3/log4j-api-2.13.3.jar
[ERROR] urls[13] = file:/d:/Work/MavenRepository/org/javalite/activejdbc/3.0-SNAPSHOT/activejdbc-3.0-SNAPSHOT.jar
[ERROR] urls[14] = file:/d:/Work/MavenRepository/org/javalite/app-config/3.0-SNAPSHOT/app-config-3.0-SNAPSHOT.jar
[ERROR] urls[15] = file:/d:/Work/MavenRepository/org/codehaus/groovy/groovy/3.0.7/groovy-3.0.7.jar
[ERROR] urls[16] = file:/d:/Work/MavenRepository/com/datastax/oss/java-driver-core-shaded/4.11.0/java-driver-core-shaded-4.11.0.jar
[ERROR] urls[17] = file:/d:/Work/MavenRepository/com/datastax/oss/native-protocol/1.5.0/native-protocol-1.5.0.jar
[ERROR] urls[18] = file:/d:/Work/MavenRepository/com/datastax/oss/java-driver-shaded-guava/25.1-jre-graal-sub-1/java-driver-shaded-guava-25.1-jre-graal-sub-1.jar
[ERROR] urls[19] = file:/d:/Work/MavenRepository/com/typesafe/config/1.4.1/config-1.4.1.jar
[ERROR] urls[20] = file:/d:/Work/MavenRepository/com/github/jnr/jnr-posix/3.1.5/jnr-posix-3.1.5.jar
[ERROR] urls[21] = file:/d:/Work/MavenRepository/com/github/jnr/jnr-ffi/2.2.2/jnr-ffi-2.2.2.jar
[ERROR] urls[22] = file:/d:/Work/MavenRepository/com/github/jnr/jffi/1.3.1/jffi-1.3.1.jar
[ERROR] urls[23] = file:/d:/Work/MavenRepository/com/github/jnr/jffi/1.3.1/jffi-1.3.1-native.jar
[ERROR] urls[24] = file:/d:/Work/MavenRepository/org/ow2/asm/asm/9.1/asm-9.1.jar
[ERROR] urls[25] = file:/d:/Work/MavenRepository/org/ow2/asm/asm-commons/9.1/asm-commons-9.1.jar
[ERROR] urls[26] = file:/d:/Work/MavenRepository/org/ow2/asm/asm-analysis/9.1/asm-analysis-9.1.jar
[ERROR] urls[27] = file:/d:/Work/MavenRepository/org/ow2/asm/asm-tree/9.1/asm-tree-9.1.jar
[ERROR] urls[28] = file:/d:/Work/MavenRepository/org/ow2/asm/asm-util/9.1/asm-util-9.1.jar
[ERROR] urls[29] = file:/d:/Work/MavenRepository/com/github/jnr/jnr-a64asm/1.0.0/jnr-a64asm-1.0.0.jar
[ERROR] urls[30] = file:/d:/Work/MavenRepository/com/github/jnr/jnr-x86asm/1.0.2/jnr-x86asm-1.0.2.jar
[ERROR] urls[31] = file:/d:/Work/MavenRepository/com/github/jnr/jnr-constants/0.10.1/jnr-constants-0.10.1.jar
[ERROR] urls[32] = file:/d:/Work/MavenRepository/io/dropwizard/metrics/metrics-core/4.1.18/metrics-core-4.1.18.jar
[ERROR] urls[33] = file:/d:/Work/MavenRepository/org/hdrhistogram/HdrHistogram/2.1.12/HdrHistogram-2.1.12.jar
[ERROR] urls[34] = file:/d:/Work/MavenRepository/org/reactivestreams/reactive-streams/1.0.3/reactive-streams-1.0.3.jar
[ERROR] urls[35] = file:/d:/Work/MavenRepository/com/github/stephenc/jcip/jcip-annotations/1.0-1/jcip-annotations-1.0-1.jar
[ERROR] urls[36] = file:/d:/Work/MavenRepository/com/github/spotbugs/spotbugs-annotations/3.1.12/spotbugs-annotations-3.1.12.jar
[ERROR] urls[37] = file:/d:/Work/MavenRepository/com/google/code/findbugs/jsr305/3.0.2/jsr305-3.0.2.jar

[ipolevoy]

@yanchevsky using models in migrations was never intended. You can use the Baser class to execute complex queries.

[ipolevoy]

consider that for this to work, the plugin needs to add module classes to its own classpath, which is not what plugins normally do.