fix: sanitize branch name

jenkins/Jenkinsfile

@@ -1,6 +1,7 @@
 #!groovy
 
 def cleanSlateEnabled
+def sanitizedBranchName
 
 // Package change state
 def appPackageChanged
@@ -84,6 +85,7 @@ pipeline {
       steps {
         script {
           cleanSlateEnabled = sh (script: "git log -1 |  grep -qE 'ci: force'", returnStatus: true)
+          sanitizedBranchName = "${BRANCH_NAME#*/}"
 
           appPackageChanged = sh(script: 'bash ./jenkins/check_package_changed.sh app "$GIT_COMMIT" "$GIT_PREVIOUS_COMMIT"', returnStdout: true).trim()
           contractsPackageChanged = sh(script: 'bash ./jenkins/check_package_changed.sh contracts "$GIT_COMMIT" "$GIT_PREVIOUS_COMMIT"', returnStdout: true).trim()
@@ -128,7 +130,7 @@ pipeline {
                 --net=concordia_ganache_test_network""") { concordiaGanacheTest ->
 
                   contractsTestsImage = docker.build(
-                    "ecentrics/concordia-contracts-tests:${BRANCH_NAME}-v${contractsPackageVersion}-b${BUILD_NUMBER}-tests",
+                    "ecentrics/concordia-contracts-tests:${sanitizedBranchName}-v${contractsPackageVersion}-b${BUILD_NUMBER}-tests",
                     "-f docker/concordia-contracts/Dockerfile \
                     ./ \
                     --target test \
@@ -158,7 +160,7 @@ pipeline {
           steps {
             script {
               appTestsImage = docker.build(
-                "ecentrics/concordia-app:${BRANCH_NAME}-v${appPackageVersion}-b${BUILD_NUMBER}-tests",
+                "ecentrics/concordia-app:${sanitizedBranchName}-v${appPackageVersion}-b${BUILD_NUMBER}-tests",
                 "-f docker/concordia-app/Dockerfile \
                 ./ \
                 --target test \