Setup maven and build dependencies using DependencyInstaller

[saratvemulapalli]

Required for

• Integ tests Support integTests for a plugin #327
• BwC tests

[setiah]

DependencyInstaller

Provides a way to install dependencies to Maven Local.

• In P0, it pulls pre-built maven dependencies from S3.
• In P1, it can also pull maven dependencies from internal or public maven repository.
• Note - DependencyInstaller does not need to worry about concurrent builds overwriting each other dependencies. Docker configuration will support different mount points, so these dependencies can be synced to maven local within a docker.

Skeleton of methods required in DependencyInstaller -

class DependencyInstaller:
    def __init__():
        s3_loc
        component
        
    def installMavenDependenciesFromS3(dependency_list, s3_loc, custom_maven_local_path=None)
        """
        P0
        """
        
    def installBuildDependenciesFromS3(dependency_list, s3_loc_2):
        """
        P0 like job scheduler. 
        """
        
    def installMavenDependenciesFromS3(component, custom_maven_local_path=None)
        """
        TBD
        
        uses findDependencies to identify all dependencies for a given component.
        """
        
    def cleanUp()
        """
        
        Removes all downloaded dependencies in ~/.m2 or a custom directory.
        """
        
        
    def findDependencies(component)
        """
        TBD - Optional for now.
        
        identifies maven dependencies for a given component
        """

[minalsha]

as part of the issue, you would need to also address:#331