Test testNonEmptyGroupCreation modified

testNonEmptyGroupCreation renamed to testGroupCreationWithValidData.
randomValidGroupGenerator DataProvider was created.
randomValidGroupGenerator fill group fields by random values.
AlsoOfGroupCreationTests removed from project

AlsoOfGroupCreationTests removed from project.
GroupRemovalTests modified by using random index

GroupRemovalTests modified by using random index
GroupModificationTests modified by using random index

GroupModificationTests modified by using random index
GroupModificationTests was modified by using DataProvider

GroupModificationTests was modified by using DataProvider.
randomValidGroupGenerator dataprovider was moved to TestBase class.
randomValidContactGenerator DataProvider was added to TestBase

randomValidContactGenerator DataProvider was added to TestBase
ContactCreationTests modification was started

ContactCreationTests modification was started. Random data would be
used. Current version is not final.